Fix possible use of garbage value in acquirePaintingResource

If ASSERT_NOT_REACHED is compiled out (like in release builds), then
hasFallback can be used uninitialized below.

Review URL: https://codereview.chromium.org/196113002

git-svn-id: svn://svn.chromium.org/blink/trunk@169000 bbb929c8-8fbe-4397-9dbb-9b2b20218538
diff --git a/third_party/WebKit/Source/core/rendering/svg/SVGInlineTextBox.cpp b/third_party/WebKit/Source/core/rendering/svg/SVGInlineTextBox.cpp
index 24a4ef8..7d6ac0e 100644
--- a/third_party/WebKit/Source/core/rendering/svg/SVGInlineTextBox.cpp
+++ b/third_party/WebKit/Source/core/rendering/svg/SVGInlineTextBox.cpp
@@ -361,7 +361,7 @@
     ASSERT(style);
     ASSERT(m_paintingResourceMode != ApplyToDefaultMode);
 
-    bool hasFallback;
+    bool hasFallback = false;
     if (m_paintingResourceMode & ApplyToFillMode)
         m_paintingResource = RenderSVGResource::fillPaintingResource(renderer, style, hasFallback);
     else if (m_paintingResourceMode & ApplyToStrokeMode)