Missing HAVE_V4L2 check

[Francois Gouget]

Maarten, could you fix the following winapi_check warnings:

dlls/avicap32/avicap32_main.c: HAVE_V4L2 is not declared as a conditional
dlls/avicap32/avicap32_main.c: HAVE_V4L2 is not declared as a conditional


The problem is that dlls/avicap32/avicap32_main.c checks for HAVE_V4L2 
but we lack the appropriate check in configure.ac and the macro 
declaration in include/config.h.


-- 
Francois Gouget         fgouget at free.fr        http://fgouget.free.fr/
                Dieu dit: "M-x Lumi\xE8re". Et la lumi\xE8re fut.