[Dock Icon] Refuse to update if plaque didn't load

Refuse to update the dock icon image if the dock icon plaque image fails
to load somehow. Really weird case.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>

Application/DockIconController.m

@@ -43,6 +43,9 @@ static NSString *getBadgeName(NSString *baseName, BOOL colorfulIcons) {
 }
 
 - (void)refreshDockIcon:(NSInteger)playbackStatus withProgress:(double)progressStatus {
+	// Really weird crash user experienced because the plaque image didn't load?
+	if(!dockImage || dockImage.size.width == 0 || dockImage.size.height == 0) return;
+
 	BOOL displayChanged = NO;
 	BOOL drawIcon = NO;
 	BOOL removeProgress = NO;