* string.c (sym_equal): use rb_obj_equal().

rb_obj_equal() is specially optimized in
  opt_eq_func()@vm_insnhelper.c.
  This fix is made from this discussion:
  https://www.omniref.com/ruby/2.1.4/symbols/Symbol/%3D%3D#line=8361.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48369 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,12 @@
+Tue Nov 11 10:37:09 2014  Koichi Sasada  <ko1@atdot.net>
+
+	* string.c (sym_equal): use rb_obj_equal().
+	  rb_obj_equal() is specially optimized in
+	  opt_eq_func()@vm_insnhelper.c.
+
+	  This fix is made from this discussion:
+	  https://www.omniref.com/ruby/2.1.4/symbols/Symbol/%3D%3D#line=8361.
+
 Tue Nov 11 09:38:55 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
 
 	* lib/rdoc/known_classes.rb: reverted regression changes of

string.c

@@ -8484,13 +8484,7 @@ str_scrub_bang(int argc, VALUE *argv, VALUE str)
  *  symbol, returns <code>true</code>.
  */
 
-static VALUE
-sym_equal(VALUE sym1, VALUE sym2)
-{
-    if (sym1 == sym2) return Qtrue;
-    return Qfalse;
-}
-
+#define sym_equal rb_obj_equal
 
 static int
 sym_printable(const char *s, const char *send, rb_encoding *enc)