Put findAppName under _GLFW_USE_MENUBAR.

src/cocoa_window.m

@@ -515,6 +515,8 @@ static int convertMacKeyCode(unsigned int macKeyCode)
 
 @end
 
+#if defined(_GLFW_USE_MENUBAR)
+
 // Try to figure out what the calling application is called
 //
 static NSString* findAppName(void)
@@ -557,8 +559,6 @@ static NSString* findAppName(void)
     return @"GLFW Application";
 }
 
-#if defined(_GLFW_USE_MENUBAR)
-
 // Set up the menu bar (manually)
 // This is nasty, nasty stuff -- calls to undocumented semi-private APIs that
 // could go away at any moment, lots of stuff that really should be