Bug 327507 - unitialized variable use when positioning glyphs for

<text> without x/y. r+sr=roc

layout/svg/base/src/nsSVGTextFrame.cpp

@@ -1194,7 +1194,7 @@ nsSVGTextFrame::UpdateGlyphPositioning()
 
   firstFragment = node->GetFirstGlyphFragment();
 
-  float x, y;
+  float x = 0, y = 0;
 
   {
     nsCOMPtr<nsIDOMSVGLengthList> list = GetX();