[wide-int] Fix rtl-checking build error

[Richard Sandiford]

Hit this building with --enable-checking=yes,rtl,df.  Seemed obvious
enough so I went ahead and applied it.  The definition in rtl.c was
already OK.

Richard


gcc/
        * rtl.h (hwivec_check_failed_bounds): Fix prototype.

Index: gcc/rtl.h
===================================================================
--- gcc/rtl.h   (revision 201904)
+++ gcc/rtl.h   (working copy)
@@ -711,7 +711,7 @@
     ATTRIBUTE_NORETURN;
 extern void rtl_check_failed_block_symbol (const char *, int, const char *)
     ATTRIBUTE_NORETURN;
-extern void hwivec_check_failed_bounds (const_rtvec, int, const char *, int,
+extern void hwivec_check_failed_bounds (const_hwivec, int, const char *, int,
                                        const char *)
     ATTRIBUTE_NORETURN;
 extern void rtvec_check_failed_bounds (const_rtvec, int, const char *, int,