Restore variable to release builds.


git-svn-id: http://skia.googlecode.com/svn/trunk@7572 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index 99d0c14..b729d69 100644
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -1432,7 +1432,7 @@
         SkCanvas::Config8888 srcC8888 = SkCanvas::kNative_Premul_Config8888;
         SkCanvas::Config8888 dstC8888 = SkCanvas::kNative_Premul_Config8888;
 
-        SkDEBUGCODE(bool c8888IsValid =) grconfig_to_config8888(config, false, &srcC8888);
+        bool c8888IsValid = grconfig_to_config8888(config, false, &srcC8888);
         grconfig_to_config8888(config, unpremul, &dstC8888);
 
         if (swapRAndB) {