Fix previous commit. glob_filename() returns "(char **) -1" for certain

errors, not necessarily a pointer such that (intptr_t)pointer is -1.

Also fix the style bug that the cast was not followed by a space.
This style of this file is now perfectly non-KNF for this cast too.

gnu/usr.bin/man/man/man.c

@@ -539,7 +539,7 @@ is_section (name, path)
 
 	  x = 0;
 	  vs = glob_filename (temp);
-	  if ((intptr_t)vs == -1)
+	  if (vs == (char **) -1)
 	    {
 	      free (temp);
 	      return NULL;