* date_core.c: clearly specify operator precedence.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39734 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Tue Mar 12 17:02:53 2013  TAKANO Mitsuhiro <tak@no32.tk>
+
+	* date_core.c: clearly specify operator precedence.
+
 Tue Mar 12 17:00:45 2013  TAKANO Mitsuhiro <tak@no32.tk>
 
 	* insns.def: fix condition.

ext/date/date_core.c

@@ -679,7 +679,7 @@ c_julian_leap_p(int y)
 inline static int
 c_gregorian_leap_p(int y)
 {
-    return MOD(y, 4) == 0 && y % 100 != 0 || MOD(y, 400) == 0;
+    return (MOD(y, 4) == 0 && y % 100 != 0) || MOD(y, 400) == 0;
 }
 
 static int