Display it87 VID with 3 decimal places instead of 2.

git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@4113 7894878c-1315-0410-8ee3-d5d059ff63e0

prog/sensors/chips.c

@@ -3841,7 +3841,7 @@ void print_it87(const sensors_chip_name *name)
       !sensors_get_feature(*name,SENSORS_IT87_VID,&cur)) {
     if (valid) {
       print_label(label,10);
-      printf("%+6.2f V\n",cur);
+      printf("%+6.3f V\n", cur);
     }
   }
   free(label);