Throwing the switch. Flipped the FONT_SWITCHING ifdef. New font lookup

code is now live.

gfx/src/gtk/nsFontMetricsGTK.h

@@ -30,7 +30,7 @@
 #include <gdk/gdk.h>
 #include <gdk/gdkx.h>
 
-#undef FONT_SWITCHING
+#define FONT_SWITCHING
 #ifdef FONT_SWITCHING
 
 #ifdef ADD_GLYPH