openh264: Fix packaging issue.

mingw-w64-openh264/PKGBUILD

@@ -4,7 +4,7 @@ _realname=openh264
 pkgbase=mingw-w64-${_realname}
 pkgname="${MINGW_PACKAGE_PREFIX}-${_realname}"
 pkgver=1.6.0
-pkgrel=1
+pkgrel=2
 pkgdesc="Library for encoding/decoding H264/AVC video streams (mingw-w64)"
 arch=('any')
 url="http://www.openh264.org/"
@@ -29,10 +29,5 @@ build() {
 
 package() {
   cd "${srcdir}/build-${MINGW_CHOST}"
-  if [[ "${MINGW_CHOST}" == "i686-w64-mingw32" ]]; then
-    _prefix="mingw32"
-  else
-    _prefix="mingw64"
-  fi
-  make DESTDIR="${pkgdir}" PREFIX=${_prefix} install
+  make DESTDIR="${pkgdir}" PREFIX=${MINGW_PREFIX} install
 }