Merge pull request #1 from ancestral/ancestral-apple-ctrl-click

Update mouse_handler_base.cpp for OS X to look for ctrl-click instead of command-click

src/mouse_handler_base.cpp

@@ -42,7 +42,7 @@ int commands_disabled= 0;
 static bool command_active()
 {
 #ifdef __APPLE__
-	return (SDL_GetModState()&KMOD_META) != 0;
+	return (SDL_GetModState()&KMOD_CTRL) != 0;
 #else
 	return false;
 #endif