Removed some compiler warnings

gfx/src/motif/nsDeviceContextUnix.h

@@ -30,7 +30,7 @@
 #include "X11/Intrinsic.h"
 
 /* nsDrawingSurface is actually the following struct */
-typedef struct nsDrawingSurfaceUnix {
+struct nsDrawingSurfaceUnix {
   Display *display ;
   Drawable drawable ;
   GC       gc ;

gfx/src/motif/nsImageUnix.cpp

@@ -333,6 +333,7 @@ PRInt16 i;
     ConvertImage(aDrawingSurface);
     CreateImage(aDrawingSurface);
     }
+  return NS_OK;
 }
 
 //------------------------------------------------------------

widget/public/nsStringUtil.h

@@ -76,4 +76,4 @@ if (! _ns_smallBufUsed) \
     delete aBuf; 
 
 
-#endif  // NSStringUtil
+#endif  // NSStringUtil