msvideo.dll16: Check if any 16 bit thunks have been allocated before accessing pointer.

[Sebastian Lackner]

From: Michael Müller <michael at fds-team.de>

Signed-off-by: Michael Müller <michael at fds-team.de>
Signed-off-by: Sebastian Lackner <sebastian at fds-team.de>
---

For https://bugs.winehq.org/show_bug.cgi?id=41448.

 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 28f126c957e..d390020eccd 100644
--- a/dlls/msvideo.dll16/msvideo16.c
+++ b/dlls/msvideo.dll16/msvideo16.c
@@ -771,6 +771,9 @@ 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