Fix "options inet6" breaking IPv4 name resolution (reported by Matt LaPlante, #17)

ChangeLog

@@ -4,6 +4,7 @@ UNRELEAESD  David Schweikert  <david@schweikert.ch>
   * Add --enable-ipv4 and --enable-ipv6 options to configure (Niclas Zeising)
   * Fix removing of unreachable hosts when doing loop (Thomas Liske, #13 #23)
   * Fix -A for fping6 (reported by Matt LaPlante, #14)
+  * Fix "options inet6" breaking IPv4 name resolution (reported by Matt LaPlante, #17)
   * Set default data size to 56 bytes on all architectures (#18)
   * Added contrib/fping.spec (Stephen Schaefer, #24)
   * Convert man-page source to POD for easier maintenance

src/fping.c

@@ -2151,6 +2151,12 @@ void add_name( char *name )
         }/* IF */
     }/* IF */
 
+    if(host_ent->h_addrtype != AF_INET) {
+        print_warning("%s: IPv6 address returned by gethostbyname (options inet6 in resolv.conf?)\n", name );
+        num_noaddress++;
+        return; 
+    }
+  
     host_add = ( struct in_addr* )*( host_ent->h_addr_list ); 
     if( host_add == NULL )
     {