Some fixes for win32 gstreamer-0.10 and its plugins

[Tomasz Wasilczyk]

Hi,

I've been working recently on win32 build of gstreamer. I've made some
fixes, that I think should be pushed to upstream.

Warning fixes:
https://dl.dropboxusercontent.com/u/5448886/contrib/mingw32-gst-plugins-bad-warnings.patch
https://dl.dropboxusercontent.com/u/5448886/contrib/mingw32-gst-plugins-base-warnings.patch
https://dl.dropboxusercontent.com/u/5448886/contrib/mingw32-gstreamer-warnings.patch

Build fix (not mine, it was in OBS repo):
https://dl.dropboxusercontent.com/u/5448886/contrib/gst-plugins-base-0.10.28-gnomevfswin32.patch

Winks fix:
https://dl.dropboxusercontent.com/u/5448886/contrib/mingw32-gst-plugins-bad-winks-fix.patch

The last one was most important for me, because it actually fixes
improperly working winks plugin. The patch contains:
- configure.ac fix, to allow winks building at all;
- Makefile.am fix, to package missing source files;
- fixate output size at early negotiation stage, because winks doesn't
support ranges; there was already a fixme comment for that.

The whole OBS project is accessible here:
https://build.opensuse.org/project/show?project=home%3Atomkiewicz%3Agst0

Waiting for feedback,
Tomek