The update to Wine 5.0.4 brought a potential build problem depending

on options chosen and packages installed (or not).

Temporarily add a patch files/patch-dlls_qcap_v4l.c to resolve problems
where v4l (multimedia/libv4l) is used when present, even if explicitly
disabled during ./configure.

PR:		254601
Submitted by:	Felix Palmen <felix@palmen-it.de>

emulators/wine/files/patch-dlls_qcap_v4l.c

@@ -0,0 +1,14 @@
+--- dlls/qcap/v4l.c.orig	2021-03-27 14:39:57 UTC
++++ dlls/qcap/v4l.c
+@@ -63,9 +63,10 @@
+ #include "qcap_main.h"
+ #include "capture.h"
+ 
++WINE_DEFAULT_DEBUG_CHANNEL(qcap);
++
+ #ifdef HAVE_LINUX_VIDEODEV2_H
+ 
+-WINE_DEFAULT_DEBUG_CHANNEL(qcap);
+ WINE_DECLARE_DEBUG_CHANNEL(winediag);
+ 
+ static typeof(open) *video_open = open;