Fixed two bugs in SW-only clip mask generation

http://codereview.appspot.com/6306086/



git-svn-id: http://skia.googlecode.com/svn/trunk@4290 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index d2b312f..1fda26b 100644
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -605,9 +605,11 @@
 
 ////////////////////////////////////////////////////////////////////////////////
 
-void GrContext::clear(const GrIRect* rect, const GrColor color) {
+void GrContext::clear(const GrIRect* rect, 
+                      const GrColor color, 
+                      GrRenderTarget* target) {
     this->flush();
-    fGpu->clear(rect, color);
+    fGpu->clear(rect, color, target);
 }
 
 void GrContext::drawPaint(const GrPaint& paint) {