revert to DeviceRGB colorspace by default, which was changed accidentially
in rev. 637



git-svn-id: http://skia.googlecode.com/svn/trunk@675 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/utils/mac/SkCreateCGImageRef.cpp b/src/utils/mac/SkCreateCGImageRef.cpp
index a1d7cc4..f4bda45 100644
--- a/src/utils/mac/SkCreateCGImageRef.cpp
+++ b/src/utils/mac/SkCreateCGImageRef.cpp
@@ -91,7 +91,7 @@
 
     bool releaseColorSpace = false;
     if (NULL == colorSpace) {
-        colorSpace = CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB);
+        colorSpace = CGColorSpaceCreateDeviceRGB();
         releaseColorSpace = true;
     }