Make printf in GrContext about partial pixel coverage be debug-only



git-svn-id: http://skia.googlecode.com/svn/trunk@3516 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index 58d3ad9..0bcecd6 100644
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -1943,10 +1943,12 @@
     fDrawState->setColorFilter(paint.fColorFilterColor, paint.fColorFilterXfermode);
     fDrawState->setCoverage(paint.fCoverage);
 
+#if GR_DEBUG
     if ((paint.getActiveMaskStageMask() || 0xffffffff != paint.fCoverage) &&
         !fGpu->canApplyCoverage()) {
         GrPrintf("Partial pixel coverage will be incorrectly blended.\n");
     }
+#endif
 }
 
 GrDrawTarget* GrContext::prepareToDraw(const GrPaint& paint,