[FFmpeg-cvslog] vfwcap: Add fallback define for HWND_MESSAGE

[Diego Biurrun]

ffmpeg | branch: master | Diego Biurrun <diego at biurrun.de> | Mon Aug 25 17:26:15 2014 +0200| [ab56fabe6294524e99815451ad01e4ff50c6d734] | committer: Diego Biurrun

vfwcap: Add fallback define for HWND_MESSAGE

Some obsolete versions of the MinGW32 runtime (<4.0.0) lack the definition.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ab56fabe6294524e99815451ad01e4ff50c6d734
---

 libavdevice/vfwcap.c |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavdevice/vfwcap.c b/libavdevice/vfwcap.c
index c067be3..b47de1b 100644
--- a/libavdevice/vfwcap.c
+++ b/libavdevice/vfwcap.c
@@ -27,6 +27,11 @@
 #include <windows.h>
 #include <vfw.h>
 
+/* Some obsolete versions of MinGW32 before 4.0.0 lack this. */
+#ifndef HWND_MESSAGE
+#define HWND_MESSAGE ((HWND) -3)
+#endif
+
 struct vfw_ctx {
     const AVClass *class;
     HWND hwnd;