OpenBSD pcap_setnonblock() and pcap_getnonblock() do not support errbuf.

Index: Pcap.xs
--- Pcap.xs.orig
+++ Pcap.xs
@@ -336,20 +336,16 @@ pcap_setnonblock(p, nb, err)
 
 	CODE:
 		if (SvROK(err)) {
-            char    *errbuf = NULL;
             SV      *err_sv = SvRV(err);
 
-            Newx(errbuf, PCAP_ERRBUF_SIZE+1, char);
-			RETVAL = pcap_setnonblock(p, nb, errbuf);
+			RETVAL = pcap_setnonblock(p, nb, NULL);
 
 			if (RETVAL == -1) {
-				sv_setpv(err_sv, errbuf);
+				sv_setpv(err_sv, pcap_geterr(p));
 			} else {
 				err_sv = &PL_sv_undef;
 			}
 
-			safefree(errbuf);
-
 		} else
 			croak("arg3 not a reference");	
 
@@ -365,19 +361,15 @@ pcap_getnonblock(p, err)
 
     CODE:
         if (SvROK(err)) {
-            char    *errbuf = NULL;
             SV      *err_sv = SvRV(err);
 
-            Newx(errbuf, PCAP_ERRBUF_SIZE+1, char);
-            RETVAL = pcap_getnonblock(p, errbuf);
+            RETVAL = pcap_getnonblock(p, NULL);
 
             if (RETVAL == -1) {
-                sv_setpv(err_sv, errbuf);
+                sv_setpv(err_sv, pcap_geterr(p));
             } else {
                 err_sv = &PL_sv_undef;
             }
-
-            safefree(errbuf);
 
 		} else
 			croak("arg2 not a reference");