Fix GCC warnings to be ready for GCC standalone build

third_party/agg23/0001-gcc-warning.patch

Index: third_party/agg23/0001-gcc-warning.patch
diff --git a/third_party/agg23/0001-gcc-warning.patch b/third_party/agg23/0001-gcc-warning.patch
new file mode 100644
index 0000000000000000000000000000000000000000..e8d26baae2a6eea50411ef7221cf5bd0c5be30f6
--- /dev/null
+++ b/third_party/agg23/0001-gcc-warning.patch
@@ -0,0 +1,13 @@
+diff --git a/third_party/agg23/agg_path_storage.h b/third_party/agg23/agg_path_storage.h
+index dc13851..35d9ab0 100644
+--- a/third_party/agg23/agg_path_storage.h
++++ b/third_party/agg23/agg_path_storage.h
+@@ -40,7 +40,7 @@ public:
+         {
+             return (m_vertex_idx < m_path->total_vertices()) ?
+                    m_path->vertex(m_vertex_idx++, x, y) :
+-                   path_cmd_stop;

[Lei Zhang, 2016/05/13 21:52:16]

This doesn't match the actual change. Regenerate the patch?

[Wei Li, 2016/05/13 23:22:34]

Done.

++                   static_cast<unsigned>(path_cmd_stop);
+         }
+     private:
+         const path_storage* m_path;