ui/cocoa: Drop tests for CGImageCreateWithImageInRect support

The code that tries to test at both compiletime and runtime
for whether CGImageCreateWithImageInRect is supported provokes
a compile warning on OSX 10.3:

ui/cocoa.m:378:13: warning: comparison of function 'CGImageCreateWithImageInRect'
      equal to a null pointer is always false[-Wtautological-pointer-compare]
        if (CGImageCreateWithImageInRect == NULL) { // test if "CGImageCreateWithImageInRect" is
supported on host at runtime
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~    ~~~~

The simplest way to deal with this is just to drop this code,
since we don't in practice support OSX 10.4 anyway. (10.5 was
released in 2007 and is the last PPC version, so is the earliest
we really need to continue to support at all.)
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Message-id: 1431296361-16981-2-git-send-email-peter.maydell@linaro.org

ui/cocoa.m

@@ -374,40 +374,30 @@ QemuCocoaView *cocoaView;
             0, //interpolate
             kCGRenderingIntentDefault //intent
         );
-// test if host supports "CGImageCreateWithImageInRect" at compile time
-#if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_4)
-        if (CGImageCreateWithImageInRect == NULL) { // test if "CGImageCreateWithImageInRect" is supported on host at runtime
-#endif
-            // compatibility drawing code (draws everything) (OS X < 10.4)
-            CGContextDrawImage (viewContextRef, CGRectMake(0, 0, [self bounds].size.width, [self bounds].size.height), imageRef);
-#if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_4)
-        } else {
-            // selective drawing code (draws only dirty rectangles) (OS X >= 10.4)
-            const NSRect *rectList;
+        // selective drawing code (draws only dirty rectangles) (OS X >= 10.4)
+        const NSRect *rectList;
 #if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)
-            NSInteger rectCount;
+        NSInteger rectCount;
 #else
-            int rectCount;
+        int rectCount;
 #endif
-            int i;
-            CGImageRef clipImageRef;
-            CGRect clipRect;
-
-            [self getRectsBeingDrawn:&rectList count:&rectCount];
-            for (i = 0; i < rectCount; i++) {
-                clipRect.origin.x = rectList[i].origin.x / cdx;
-                clipRect.origin.y = (float)screen.height - (rectList[i].origin.y + rectList[i].size.height) / cdy;
-                clipRect.size.width = rectList[i].size.width / cdx;
-                clipRect.size.height = rectList[i].size.height / cdy;
-                clipImageRef = CGImageCreateWithImageInRect(
-                    imageRef,
-                    clipRect
-                );
-                CGContextDrawImage (viewContextRef, cgrect(rectList[i]), clipImageRef);
-                CGImageRelease (clipImageRef);
-            }
+        int i;
+        CGImageRef clipImageRef;
+        CGRect clipRect;
+
+        [self getRectsBeingDrawn:&rectList count:&rectCount];
+        for (i = 0; i < rectCount; i++) {
+            clipRect.origin.x = rectList[i].origin.x / cdx;
+            clipRect.origin.y = (float)screen.height - (rectList[i].origin.y + rectList[i].size.height) / cdy;
+            clipRect.size.width = rectList[i].size.width / cdx;
+            clipRect.size.height = rectList[i].size.height / cdy;
+            clipImageRef = CGImageCreateWithImageInRect(
+                                                        imageRef,
+                                                        clipRect
+                                                        );
+            CGContextDrawImage (viewContextRef, cgrect(rectList[i]), clipImageRef);
+            CGImageRelease (clipImageRef);
         }
-#endif
         CGImageRelease (imageRef);
     }
 }