Add missing proxy_stub_offset_ initializer.

Change-Id: Icaa3393586bb33ef86f0626b0260748cada1fced
diff --git a/src/oat.cc b/src/oat.cc
index b0a9aef..79a16cf 100644
--- a/src/oat.cc
+++ b/src/oat.cc
@@ -147,6 +147,9 @@
     vmap_table_offset_(0),
     gc_map_offset_(0),
     invoke_stub_offset_(0)
+#if defined(ART_USE_LLVM_COMPILER)
+  , proxy_stub_offset_(0)
+#endif
 {}
 
 OatMethodOffsets::OatMethodOffsets(uint32_t code_offset,