* ext/etc/etc.c: parenthesize macro arguments.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@30826 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Wed Feb  9 00:47:18 2011  Tanaka Akira  <akr@fsij.org>
+
+	* ext/etc/etc.c: parenthesize macro arguments.
+
 Tue Feb  8 19:38:00 2011  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* misc/ruby-mode.el (ruby-expr-beg): fix for invalid nest errors.

ext/etc/etc.c

@@ -557,7 +557,7 @@ etc_getgrent(VALUE obj)
     return Qnil;
 }
 
-#define numberof(array) (sizeof(array) / sizeof(*array))
+#define numberof(array) (sizeof(array) / sizeof(*(array)))
 
 #ifdef _WIN32
 VALUE rb_w32_special_folder(int type);