Fix error message when a chip is specified on the command line

with no prefix and that chip isn't found.


git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@4680 7894878c-1315-0410-8ee3-d5d059ff63e0

prog/sensors/main.c

@@ -247,7 +247,7 @@ int main (int argc, char *argv[])
     sensors_cleanup();
     exit(error);
   } else {
-    if(chips[0].prefix == SENSORS_CHIP_NAME_PREFIX_ANY)
+    if (optind == argc) /* No chip name on command line */
 	    fprintf(stderr,
 	            "No sensors found!\n"
 	            "Make sure you loaded all the kernel drivers you need.\n"