fix another out of memory condition (bb #849)

thanks to Gianluigi Tiesi <sherpya*netfarm.it>


git-svn: trunk@3650

ChangeLog

@@ -1,3 +1,8 @@
+Mon Feb 18 12:31:04 EET 2008 (edwin)
+------------------------------------
+  * libclamav/regex/regcomp.c: fix another out of memory condition (bb #849)
+			       thanks to Gianluigi Tiesi <sherpya*netfarm.it>
+
 Mon Feb 18 11:11:34 EET 2008 (edwin)
 ------------------------------------
   * libclamav/phishcheck.c: fix out of memory handling (bb #849).

libclamav/regex/regcomp.c

@@ -1060,6 +1060,9 @@ allocset(struct parse *p)
 		(void) memset((char *)p->g->setbits + (nbytes - css), 0, css);
 	}
 
+	if(!p->g->sets)
+		goto nomem;
+
 	cs = &p->g->sets[no];
 	cs->ptr = p->g->setbits + css*((no)/CHAR_BIT);
 	cs->mask = 1 << ((no) % CHAR_BIT);