Merge pull request #1564 from bangnoise/pr/IOSurface-CF-leaks

Fix leak of CoreFoundation objects during calls to vkUseIOSurfaceMVK()
diff --git a/MoltenVK/MoltenVK/GPUObjects/MVKImage.mm b/MoltenVK/MoltenVK/GPUObjects/MVKImage.mm
index da99774..9853d76 100644
--- a/MoltenVK/MoltenVK/GPUObjects/MVKImage.mm
+++ b/MoltenVK/MoltenVK/GPUObjects/MVKImage.mm
@@ -801,8 +801,10 @@
                     });
                 }
                 CFDictionaryAddValue(properties, (id)kIOSurfacePlaneInfo, planeProperties);
+                CFRelease(planeProperties);
             }
             _ioSurface = IOSurfaceCreate(properties);
+            CFRelease(properties);
         }
     }