Fixed a copy & paste error in the test/misc/ makefile.

Fixed a warning that's changed to an error in Travis CI tests.

test/misc/bug1263.c

@@ -1,17 +1,15 @@
+/* bug #1263 - erroneous error for K & R function declaration */
 
-/* bug #1263 - erroneous error for implicit function declaration */
-
-#include <stdlib.h>
-
-enum E { I };
+enum E { I = 0 };
 extern int f(enum E);
+
 int f(e)
   enum E e;
 {
-  return 1;
+  return e;
 }
 
 int main(void)
 {
-    return f(1) ? EXIT_SUCCESS : EXIT_FAILURE;
+    return f(I);
 }