compile kernel with raidframe fails for current

[Nigel J. Taylor]

I had a compile error when build amd64 kernel found to be readdisklabel recently
changed from returning string to error number. My diff below to correct.

Regards

Nigel Taylor

Index: rf_openbsdkintf.c
===================================================================
RCS file: /cvs/src/sys/dev/raidframe/rf_openbsdkintf.c,v
retrieving revision 1.51
diff -u -r1.51 rf_openbsdkintf.c
--- rf_openbsdkintf.c   21 May 2009 23:45:48 -0000      1.51
+++ rf_openbsdkintf.c   16 Aug 2009 20:37:21 -0000
@@ -2106,7 +2106,7 @@
     int spoofonly)
 {
        int unit = DISKUNIT(dev);
-       char *errstring;
+       int error;
        RF_Raid_t *raidPtr;
        int i;
        struct partition *pp;
@@ -2122,9 +2122,9 @@
        /*
         * Call the generic disklabel extraction routine.
         */
-       errstring = readdisklabel(DISKLABELDEV(dev), raidstrategy, lp,
-           spoofonly);
-       if (errstring) {
+       error = readdisklabel(DISKLABELDEV(dev), raidstrategy, lp,
+           spoofonly);
+       if (error) {
                /*printf("%s: %s\n", rs->sc_xname, errstring);*/
                return;
        }