fix type of main, use !=

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@39842 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGen/complex.c

@@ -1,10 +1,10 @@
 // RUN: clang -emit-llvm %s
 // XFAIL: *
 
-void main(void)
+int main(void)
 {
   double _Complex a = 5;
   double _Complex b = 42;
 
-  return a * b == b * a;
+  return a * b != b * a;
 }