Fixed const correctness in functions using 'wusergnusteppath'

The change introduced in previous commit for const correctness has
a small impact on WindowMaker's code, this patch fixes all the new
warnings.

WINGs/proplist.c

@@ -1706,7 +1706,8 @@ Bool WMWritePropListToFile(WMPropList * plist, const char *path)
  */
 int wmkdirhier(const char *path)
 {
-	char *t, *thePath = NULL, buf[1024];
+	const char *t;
+	char *thePath = NULL, buf[1024];
 	size_t p, plen;
 	struct stat st;
 
@@ -1799,7 +1800,7 @@ int wrmdirhier(const char *path)
 {
 	struct stat st;
 	int error;
-	char *t;
+	const char *t;
 
 	/* Only remove directories under $GNUSTEP_USER_ROOT */
 	if ((t = wusergnusteppath()) == NULL)

WINGs/userdefaults.c

@@ -83,7 +83,7 @@ const char *wusergnusteppath()
 char *wdefaultspathfordomain(const char *domain)
 {
 	char *path;
-	char *gspath;
+	const char *gspath;
 	size_t slen;
 
 	gspath = wusergnusteppath();

WINGs/wapplication.c

@@ -61,7 +61,7 @@ char *WMGetApplicationName()
 	return WMApplication.applicationName;
 }
 
-static char *checkFile(char *path, char *folder, char *ext, char *resource)
+static char *checkFile(const char *path, const char *folder, const char *ext, const char *resource)
 {
 	char *ret;
 	int extralen;

WPrefs.app/Menu.c

@@ -1478,7 +1478,7 @@ static WMPropList *getDefaultMenu(_Panel * panel)
 
 static void showData(_Panel * panel)
 {
-	char *gspath;
+	const char *gspath;
 	char *menuPath;
 	WMPropList *pmenu;
 

src/icon.c

@@ -416,7 +416,8 @@ char *get_name_for_instance_class(char *wm_instance, char *wm_class)
 
 static char *get_icon_cache_path(void)
 {
-	char *prefix, *path;
+	const char *prefix;
+	char *path;
 	int len, ret;
 
 	prefix = wusergnusteppath();

util/getstyle.c

@@ -185,7 +185,8 @@ void makeThemePack(WMPropList * style, char *themeName)
 	WMPropList *value;
 	int i;
 	size_t themeNameLen;
-	char *themeDir, *t;
+	char *themeDir;
+	const char *t;
 
 	if ((t = wusergnusteppath()) == NULL)
 		return;