From ab8563f0d430c9118b58c2dab61b1ff5b1edbf8c Mon Sep 17 00:00:00 2001
From: Reuben Morais <reuben.morais@gmail.com>
Date: Wed, 21 Mar 2012 21:25:34 -0500
Subject: [PATCH] Followup, re-added check for invalid HL2SDK paths (bug 5023,
 r=ds).

---
 AMBuildScript | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/AMBuildScript b/AMBuildScript
index ff727b8a..ce82fb42 100644
--- a/AMBuildScript
+++ b/AMBuildScript
@@ -79,8 +79,9 @@ class SM:
 						oldhead = head
 						head, tail = os.path.split(head)
 					if i.startswith('HL2SDK'):
-						(info, sdk) = findDictByKey(self.possibleSdks, 'sdk', i)
-						self.sdkInfo[sdk] = info	
+						if head != None and head != oldhead:
+							(info, sdk) = findDictByKey(self.possibleSdks, 'sdk', i)
+							self.sdkInfo[sdk] = info
 					elif head == None or head == oldhead:
 						raise Exception('Could not find a valid path for {0}'.format(i))
 				AMBuild.cache.CacheVariable(i, path)