Bug 567169: Followup changeset 4a3e8596e8fc - addresses review comments I neglected to process when pushing the patch. a=blocking-betaN

content/canvas/src/nsCanvasRenderingContext2D.cpp

@@ -3520,7 +3520,7 @@ nsCanvasRenderingContext2D::DrawImage(nsIDOMElement *imgElt, float a1,
         DirtyAllStyles();
 
         /* Direct2D isn't very good at clipping so use Fill() when we can */
-        if (CurrentState().globalAlpha = 1. && mThebes->CurrentOperator() == gfxContext::OPERATOR_OVER) {
+        if (CurrentState().globalAlpha == 1.0f && mThebes->CurrentOperator() == gfxContext::OPERATOR_OVER) {
             mThebes->Rectangle(clip);
             mThebes->Fill();
         } else {