diff -r 6d3770b1a9e1 -r 6ef9b2adca64 virtual.c
--- a/virtual.c	Sun May 23 08:30:42 2010 +0200
+++ b/virtual.c	Sun May 23 08:39:19 2010 +0200
@@ -75,13 +75,15 @@
       char *dot=rindex(strip,'.');
       if(dot) {
         *dot=0;
-        asprintf(&real_virt_name,"%s.%d",strip,disknum+virt_off);
+        if(asprintf(&real_virt_name,"%s.%d",strip,disknum+virt_off)<0)
+          error("error making virtual name");
         }
       else serror("Bad filename format");
       free(strip);
       }
     else {
-      asprintf(&real_virt_name,"%s.%d",virt_name,disknum);
+      if(asprintf(&real_virt_name,"%s.%d",virt_name,disknum)<0)
+        error("error making virtual name");
       }
     DEBUG("Vopen: real filename is '%s' disknum=%d virt_off=%d\n",
           real_virt_name,disknum,virt_off);