Added patch to check if any 16 bit thunks have been allocated before accessing pointer.

patches/msvideo16-HasThunk/0001-msvideo16-Check-if-any-16-bit-thunks-have-been-alloc.patch

@@ -0,0 +1,27 @@
+From d386a3724eac666427f7f176e7209f74e1b98885 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Michael=20M=C3=BCller?= <michael@fds-team.de>
+Date: Sun, 15 Jan 2017 18:59:10 +0100
+Subject: msvideo16: Check if any 16 bit thunks have been allocated before
+ accessing pointer.
+
+---
+ dlls/msvideo.dll16/msvideo16.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/dlls/msvideo.dll16/msvideo16.c b/dlls/msvideo.dll16/msvideo16.c
+index 8f02cc1ebc8..5a3b8aa74ee 100644
+--- a/dlls/msvideo.dll16/msvideo16.c
++++ b/dlls/msvideo.dll16/msvideo16.c
+@@ -762,6 +762,9 @@ static struct msvideo_thunk*    MSVIDEO_HasThunk(HIC16 hic)
+ {
+     struct msvideo_thunk* thunk;
+ 
++    if (!MSVIDEO_Thunks)
++        return NULL;
++
+     for (thunk = MSVIDEO_Thunks; thunk < &MSVIDEO_Thunks[MAX_THUNKS]; thunk++)
+     {
+         if (thunk->hIC16 == hic) return thunk;
+-- 
+2.11.0
+

patches/msvideo16-HasThunk/definition

@@ -0,0 +1 @@
+Fixes: [41448] Check if any 16 bit thunks have been allocated before accessing pointer

patches/patchinstall.sh

@@ -212,6 +212,7 @@ patch_enable_all ()
 	enable_msvcrt_Math_Precision="$1"
 	enable_msvfw32_ICGetDisplayFormat="$1"
 	enable_msvideo_dll16_DrawDibProfileDisplay="$1"
+	enable_msvideo16_HasThunk="$1"
 	enable_msxml3_AllowXsltScript="$1"
 	enable_ntdll_APC_Performance="$1"
 	enable_ntdll_APC_Start_Process="$1"
@@ -846,6 +847,9 @@ patch_enable ()
 		msvideo.dll16-DrawDibProfileDisplay)
 			enable_msvideo_dll16_DrawDibProfileDisplay="$2"
 			;;
+		msvideo16-HasThunk)
+			enable_msvideo16_HasThunk="$2"
+			;;
 		msxml3-AllowXsltScript)
 			enable_msxml3_AllowXsltScript="$2"
 			;;
@@ -5181,6 +5185,21 @@ if test "$enable_msvideo_dll16_DrawDibProfileDisplay" -eq 1; then
 	) >> "$patchlist"
 fi
 
+# Patchset msvideo16-HasThunk
+# |
+# | This patchset fixes the following Wine bugs:
+# |   *	[#41448] Check if any 16 bit thunks have been allocated before accessing pointer
+# |
+# | Modified files:
+# |   *	dlls/msvideo.dll16/msvideo16.c
+# |
+if test "$enable_msvideo16_HasThunk" -eq 1; then
+	patch_apply msvideo16-HasThunk/0001-msvideo16-Check-if-any-16-bit-thunks-have-been-alloc.patch
+	(
+		echo '+    { "Michael Müller", "msvideo16: Check if any 16 bit thunks have been allocated before accessing pointer.", 1 },';
+	) >> "$patchlist"
+fi
+
 # Patchset msxml3-AllowXsltScript
 # |
 # | This patchset fixes the following Wine bugs: