contribs: vorbis: Fix msvc build

contrib/src/vorbis/msvc.patch

+--- libvorbis/lib/os.h	2014-01-22 10:53:32.000000000 +0100
++++ /home/vlc/vlc/contrib/windowsphone/libvorbis/lib/os.h	2014-12-15 16:54:46.588645600 +0100
+@@ -120,7 +120,7 @@
+
+ /* MSVC inline assembly. 32 bit only; inline ASM isn't implemented in the
+  * 64 bit compiler */
+-#if defined(_MSC_VER) && !defined(_WIN64) && !defined(_WIN32_WCE)
++#if defined(_MSC_VER) && !defined(_WIN64) && !defined(_WIN32_WCE) && !defined(_M_ARM)
+ #  define VORBIS_FPU_CONTROL
+
+ typedef ogg_int16_t vorbis_fpu_control;

contrib/src/vorbis/rules.mak

@@ -26,6 +26,9 @@ $(TARBALLS)/libvorbis-$(VORBIS_VERSION).tar.xz:
 libvorbis: libvorbis-$(VORBIS_VERSION).tar.xz .sum-vorbis
 	$(UNPACK)
 	$(APPLY) $(SRC)/vorbis/osx.patch
+ifdef HAVE_VISUALSTUDIO
+	$(APPLY) $(SRC)/vorbis/msvc.patch
+endif
 	$(UPDATE_AUTOCONFIG)
 	$(MOVE)