(maybe_objc_comptypes): Return 0 (incompatible) rather than 2 (similar enough) as the default.

(maybe_objc_comptypes): Return 0
        (incompatible) rather than 2 (similar enough) as the default.
        This was an inadvertent change in the Objective-C merge.

From-SVN: r4153

gcc/c-lang.c

@@ -85,7 +85,7 @@ maybe_objc_comptypes (lhs, rhs, reflexive)
      tree lhs, rhs;
      int reflexive;
 {
-  return 2;
+  return 0;
 }
 
 tree

gcc/objc/objc-act.c

@@ -584,7 +584,7 @@ maybe_objc_comptypes (lhs, rhs, reflexive)
 {
   if (doing_objc_thang)
     return objc_comptypes (lhs, rhs, reflexive);
-  return 2;
+  return 0;
 }
 
 static tree