Make debug statement print function name

The wmessage function returns "enter" in two functions, so is
not possible to know the function that sends the message.

It is better to replace it with the function name.

src/wmspec.c

@@ -532,7 +532,7 @@ void wNETWMInitStuff(WScreen * scr)
 	int i;
 
 #ifdef DEBUG_WMSPEC
-	wmessage("enter");
+	wmessage("wNETWMInitStuff");
 #endif
 
 #ifdef HAVE_XINTERNATOMS
@@ -1314,7 +1314,7 @@ Bool wNETWMCheckInitialClientState(WWindow * wwin)
 	Bool hasState = False;
 
 #ifdef DEBUG_WMSPEC
-	wmessage("enter");
+	wmessage("wNETWMCheckInitialClientState");
 #endif
 
 	wNETWMShowingDesktop(wwin->screen_ptr, False);