Make sure to check the value of the constant expression, as suggested by Daniel.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@65021 91177308-0d34-0410-b5e6-96231b3b80d8

test/Sema/const-eval.c

@@ -33,4 +33,4 @@ _Complex float g16 = (1.0f + 1.0fi);
 // ?: in constant expressions.
 int g17[(3?:1) - 2]; 
 
-EVAL_EXPR(18, (int)((void*)10 + 10));
+EVAL_EXPR(18, ((int)((void*)10 + 10)) == 20 ? 1 : -1);