Adjust to ObjFW change.

Applications don't terminate after applicationDidFinishLaunching
anymore.

src/OGKEvent.m

@@ -47,7 +47,7 @@
 - (of_unichar_t)character
 {
 	if (event.keyboard.unichar < 1)
-		return 0xFFFD;
+		return 0;
 
 	return event.keyboard.unichar;
 }

tests/TestMain.h

@@ -31,7 +31,6 @@
 	OGKBitmap *bitmap;
 	of_point_t position;
 	of_dimension_t scale;
-	BOOL running;
 	ogk_rotation_t rotation;
 	ogk_color_t tint;
 	OFThread *animationThread;

tests/TestMain.m

@@ -36,7 +36,7 @@ OF_APPLICATION_DELEGATE(TestMain)
 - (void)display: (OGKDisplay*)display
       wasClosed: (OGKCloseEvent*)event
 {
-	running = NO;
+	[OFApplication terminate];
 }
 
 - (void)keyWasPressed: (OGKKeyPressEvent*)event
@@ -80,7 +80,7 @@ OF_APPLICATION_DELEGATE(TestMain)
 		[self toggleAnimation];
 		break;
 	case OGK_KEY_Q:
-		running = NO;
+		[OFApplication terminate];
 		break;
 	}
 }
@@ -191,7 +191,7 @@ OF_APPLICATION_DELEGATE(TestMain)
 	    0);
 	tint = ogk_color(1, 1, 1, 0);
 
-	for (running = YES; running;) {
+	for (;;) {
 		@autoreleasepool {
 			[self handleEvents];
 			[self draw];