Fix bad cache-size calculation when hosts-file read fails.

CHANGELOG

@@ -18,6 +18,10 @@ version 2.76
 	    that the same name is empty. Thanks to Edwin Török for
 	    the patch.
 
+	    Fix failure to correctly calculate cache-size when 
+	    reading a hosts-file fails. Thanks to André Glüpker 
+	    for the patch.
+
 	
 version 2.75
             Fix reversion on 2.74 which caused 100% CPU use when a 

src/cache.c

@@ -919,7 +919,7 @@ int read_hostsfile(char *filename, unsigned int index, int cache_size, struct cr
   if (!f)
     {
       my_syslog(LOG_ERR, _("failed to load names from %s: %s"), filename, strerror(errno));
-      return 0;
+      return cache_size;
     }
   
   eatspace(f);