Use %hhd for BOOLs in format string.

Author: jpetrie

src/MacVim/MMAppController.m

@@ -1239,7 +1239,7 @@ - (IBAction)ligaturesButtonClicked:(id)sender
             kCFPreferencesCurrentApplication);
     CFPreferencesAppSynchronize(kCFPreferencesCurrentApplication);
 
-    ASLogInfo(@"Use ligatures=%ld", enable);
+    ASLogInfo(@"Use ligatures=%hhd", enable);
 
     // This action is called when the user clicks the "enable support for ligatures"
     // button in the advanced preferences pane.