Bug 726764. Avoid leaking CGPaths when getting text paths. r=joe

gfx/2d/ScaledFontMac.cpp

@@ -102,7 +102,9 @@ ScaledFontMac::GetPathForGlyphs(const GlyphBuffer &aBuffer, const DrawTarget *aT
           CGPathAddPath(path, &matrix, glyphPath);
           CGPathRelease(glyphPath);
       }
-      return new PathCG(path, FILL_WINDING);
+      TemporaryRef<Path> ret = new PathCG(path, FILL_WINDING);
+      CGPathRelease(path);
+      return ret;
   } else {
       return ScaledFontBase::GetPathForGlyphs(aBuffer, aTarget);
   }