follow RFloat member name change.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@15715 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

.gdbinit

@@ -46,7 +46,7 @@ define rp
     print (struct RClass *)$arg0
   else
   if ($flags & RUBY_T_MASK) == RUBY_T_FLOAT
-    printf "T_FLOAT: %.16g ", (((struct RFloat*)$arg0)->value)
+    printf "T_FLOAT: %.16g ", (((struct RFloat*)$arg0)->float_value)
     print (struct RFloat *)$arg0
   else
   if ($flags & RUBY_T_MASK) == RUBY_T_STRING