Changed return comment for main function.

server.c

@@ -332,7 +332,7 @@ static int checkCoords(uint16_t msg)
  *	    and finishes it appropriately.
  * @param argc The count of commandline arguments.
  * @param argv The array of commandline arguments.
- * @return 0 on success. 1 on failure.
+ * @return 0 on success. Non-zero on failure.
  */
 int main(int argc, char *argv[])
 {