From c0e791dbe9a25b830e46511117d2c5ed6a5c4be4 Mon Sep 17 00:00:00 2001
From: Scott Lahteine <sourcetree@thinkyhead.com>
Date: Tue, 13 Oct 2015 03:58:11 -0700
Subject: [PATCH] Only look for "N" line number as first parameter

---
 Marlin/Marlin_main.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index 44102ef18..1b2503872 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -834,8 +834,10 @@ void get_command() {
         fromsd[cmd_queue_index_w] = false;
       #endif
 
-      char *npos = strchr(command, 'N');
-      char *apos = strchr(command, '*');
+      while (*command == ' ') command++; // skip any leading spaces
+      char* npos = (*command == 'N') ? command : NULL; // Require the N parameter to start the line
+      char* apos = strchr(command, '*');
+
       if (npos) {
 
         boolean M110 = strstr_P(command, PSTR("M110")) != NULL;