Don't respond to SetWindowTitleMsgID message in live resize

Responding to these messages would clobber the text dimension title that
is set during live resize.

src/MacVim/MMVimController.m

@@ -682,7 +682,11 @@ static BOOL isUnsafeMessage(int msgid);
         NSString *string = [[NSString alloc] initWithBytes:(void*)bytes
                 length:len encoding:NSUTF8StringEncoding];
 
-        [windowController setTitle:string];
+        // While in live resize the window title displays the dimensions of the
+        // window so don't clobber this with a spurious "set title" message
+        // from Vim.
+        if (![[windowController vimView] inLiveResize])
+            [windowController setTitle:string];
 
         [string release];
     } else if (SetDocumentFilenameMsgID == msgid) {

src/MacVim/MMWindowController.m

@@ -308,10 +308,8 @@
 
 - (void)setTitle:(NSString *)title
 {
-    if (title) {
+    if (title)
         [decoratedWindow setTitle:title];
-        [fullscreenWindow setTitle:title];
-    }
 }
 
 - (void)setDocumentFilename:(NSString *)filename