Recommit rL323952: [DebugInfo] Enable debug information for C99 VLA types.

Fixed build issue when building with g++-4.8 (specialization after instantiation).

llvm-svn: 324173
diff --git a/clang/lib/CodeGen/CGBlocks.cpp b/clang/lib/CodeGen/CGBlocks.cpp
index 5f73d4c..d60b5fb 100644
--- a/clang/lib/CodeGen/CGBlocks.cpp
+++ b/clang/lib/CodeGen/CGBlocks.cpp
@@ -1479,8 +1479,8 @@
         const CGBlockInfo::Capture &capture = blockInfo.getCapture(variable);
         if (capture.isConstant()) {
           auto addr = LocalDeclMap.find(variable)->second;
-          DI->EmitDeclareOfAutoVariable(variable, addr.getPointer(),
-                                        Builder);
+          (void)DI->EmitDeclareOfAutoVariable(variable, addr.getPointer(),
+                                              Builder);
           continue;
         }