Eliminate warning in Release-Asserts mode. No functionality change

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@90204 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Sema/SemaExpr.cpp

@@ -3052,6 +3052,7 @@ Sema::ActOnCallExpr(Scope *S, ExprArg fn, SourceLocation LParenLoc,
       // method template.
       assert((MemE->getNumDecls() > 1) ||
              isa<FunctionTemplateDecl>(*MemE->decls_begin()));
+      (void)MemE;
 
       return Owned(BuildCallToMemberFunction(S, Fn, LParenLoc, Args, NumArgs,
                                              CommaLocs, RParenLoc));