fixed sporadic Bus Error in GetAvailableDisplayModes

src/native/macosx/org_lwjgl_Display.cpp

@@ -79,7 +79,8 @@ static double _getDictDouble (CFDictionaryRef refDict, CFStringRef key)
 
 jobjectArray GetAvailableDisplayModesOSX(JNIEnv * env)
 {
-    CFIndex		i, count, availableModes;
+    CFIndex		i, count; 
+    CFIndex             availableModes = 0;
     CFArrayRef		displayModes = NULL;
     int			n = 0;