[gc-improv] Missing prototype in the last patch

[Laurynas Biveinis]

Committed to gc-improv.

2011-04-07  Laurynas Biveinis  <laurynas.bivei...@gmail.com>

        * rtl.h (gen_rtx_CONST): New.

Index: rtl.h
===================================================================
--- rtl.h	(revision 171651)
+++ rtl.h	(working copy)
@@ -2188,6 +2188,7 @@
    generation functions included above do the raw handling.  If you
    add to this list, modify special_rtx in gengenrtl.c as well.  */
 
+extern rtx gen_rtx_CONST (enum machine_mode, rtx);
 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
 extern rtx gen_raw_REG (enum machine_mode, int);