Fix when building against 10.6 sdk

Headers/iTerm/iTerm.h

@@ -39,6 +39,8 @@
 static const int NSWindowCollectionBehaviorFullScreenPrimary = 1 << 7;
 static const int NSApplicationPresentationAutoHideToolbar = (1 << 11);
 static const int NSApplicationPresentationFullScreen = (1 << 10);
+#endif
+#if MAC_OS_X_VERSION_MAX_ALLOWED < 1060
 typedef unsigned int NSApplicationPresentationOptions;
 #endif