Fix debug build after r7153 (removed param referenced in assertion)



git-svn-id: http://skia.googlecode.com/svn/trunk@7154 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/effects/gradients/SkRadialGradient.cpp b/src/effects/gradients/SkRadialGradient.cpp
index db089f6..b9c4e3b 100644
--- a/src/effects/gradients/SkRadialGradient.cpp
+++ b/src/effects/gradients/SkRadialGradient.cpp
@@ -570,7 +570,7 @@
 /////////////////////////////////////////////////////////////////////
 
 GrEffect* SkRadialGradient::asNewEffect(GrContext* context, const SkPaint&) const {
-    SkASSERT(NULL != context && NULL != stage);
+    SkASSERT(NULL != context);
 
     SkMatrix matrix;
     if (!this->getLocalMatrix().invert(&matrix)) {