wmaker: Fix compiler warnings about pointer <--> integer conversion

There may be issues with running applications in 64-bit mode when
they were written with tacit assumptions about 32-bit platforms.
For example,

    * Assuming that a pointer can be cast back and forth to an integer

The reason is that the size of the integer and pointer may be different.
See the description of "[PATCH] Warn when casting a pointer (constant)
to an integer of different size." in the gcc mailing list

http://gcc.gnu.org/ml/gcc-patches/2005-12/msg01881.html

where it was also suggested the use of casts to uintptr_t. This is
what this patch does.

As a result the following warnings are fixed, leaving us with an
almost warning-free compilation in 64-bit platforms:

defaults.c:1446: warning: cast to pointer from integer of different size
defaults.c:1457: warning: cast to pointer from integer of different size
defaults.c:1471: warning: cast to pointer from integer of different size
defaults.c:1486: warning: cast to pointer from integer of different size
icon.c:67: warning: cast from pointer to integer of different size
menu.c:112: warning: cast from pointer to integer of different size
switchmenu.c:452: warning: cast from pointer to integer of different size
window.c:140: warning: cast from pointer to integer of different size
window.c:2217: warning: cast to pointer from integer of different size
workspace.c:135: warning: cast to pointer from integer of different size
workspace.c:214: warning: cast to pointer from integer of different size
workspace.c:634: warning: cast to pointer from integer of different size
workspace.c:1330: warning: cast to pointer from integer of different size
workspace.c:1514: warning: cast to pointer from integer of different size
wfilepanel.c:135: warning: cast from pointer to integer of different size
wfilepanel.c:171: warning: cast from pointer to integer of different size
wfontpanel.c:499: warning: cast to pointer from integer of different size
wfontpanel.c:500: warning: cast to pointer from integer of different size
wfontpanel.c:505: warning: cast to pointer from integer of different size
wfontpanel.c:506: warning: cast to pointer from integer of different size
wfontpanel.c:776: warning: cast from pointer to integer of different size
wfontpanel.c:777: warning: cast from pointer to integer of different size
wfontpanel.c:877: warning: cast from pointer to integer of different size
wfontpanel.c:878: warning: cast from pointer to integer of different size
wpanel.c:363: warning: cast from pointer to integer of different size
fontl.c:42: warning: cast from pointer to integer of different size
fontl.c:42: warning: cast from pointer to integer of different size
fontl.c:42: warning: cast from pointer to integer of different size
fontl.c:90: warning: cast to pointer from integer of different size
puzzle.c:138: warning: cast from pointer to integer of different size
puzzle.c:225: warning: cast to pointer from integer of different size
wtableview.c:1031: warning: cast to pointer from integer of different size
wtableview.c:1067: warning: cast to pointer from integer of different size
wtableview.c:1069: warning: cast to pointer from integer of different size
wtableview.c:1074: warning: cast to pointer from integer of different size
wtabledelegates.c:234: warning: cast from pointer to integer of different size
wtabledelegates.c:250: warning: cast from pointer to integer of different size
wtabledelegates.c:265: warning: cast from pointer to integer of different size
wtabledelegates.c:287: warning: cast to pointer from integer of different size
wtabledelegates.c:351: warning: cast from pointer to integer of different size
wtabledelegates.c:372: warning: cast from pointer to integer of different size
wtabledelegates.c:393: warning: cast from pointer to integer of different size
wtabledelegates.c:410: warning: cast to pointer from integer of different size
test.c:44: warning: cast from pointer to integer of different size
test.c:47: warning: cast to pointer from integer of different size
test.c:55: warning: cast from pointer to integer of different size
test.c:58: warning: cast from pointer to integer of different size

WINGs/Extras/test.c

@@ -2,6 +2,7 @@
 
 #include <WINGs/WINGs.h>
 #include <stdio.h>
+#include <stdint.h>
 #include "wtableview.h"
 #include "wtabledelegates.h"
 
@@ -41,10 +42,10 @@ valueForCell(WMTableViewDelegate *self, WMTableColumn *column, int row)
             col2[i] = 0;
         }
     }
-    if ((int)WMGetTableColumnId(column) == 1)
+    if ((int)(uintptr_t)WMGetTableColumnId(column) == 1)
         return col1[row];
     else
-        return (void*)col2[row];
+        return (void*)(uintptr_t)col2[row];
 }
 
 
@@ -52,10 +53,10 @@ void
 setValueForCell(WMTableViewDelegate *self, WMTableColumn *column, int row,
                 void *data)
 {
-    if ((int)WMGetTableColumnId(column) == 1)
+    if ((int)(uintptr_t)WMGetTableColumnId(column) == 1)
         col1[row] = data;
     else
-        col2[row] = (int)data;
+        col2[row] = (int)(uintptr_t)data;
 }