* file.c (rb_home_dir): needs p on DOSISH.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@21954 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

file.c

@@ -2605,6 +2605,9 @@ rb_home_dir(const char *user, VALUE result)
 {
     const char *dir;
     char *buf;
+#if defined DOSISH || defined __CYGWIN__
+    char *p;
+#endif
     long dirlen;
 
     if (!user || !*user) {