Improvements to ffmpeg-mt-lite's PKGBUILD

diff -u a/PKGBUILD b/PKGBUILD
--- a/PKGBUILD  2011-04-27 11:55:33.520262390 +0200
+++ b/PKGBUILD  2011-04-27 11:54:42.000000000 +0200
@@ -34,7 +34,8 @@
   msg "Connecting to GIT server...."

   if [ -d "$srcdir/$_gitname" ] ; then
-    cd $_gitname && git pull origin
+    cd $_gitname
+    git pull origin
     msg "The local files are updated."
   else
     git clone $_gitroot $_gitname
@@ -46,10 +47,14 @@
   msg "Starting make..."

   cd "$srcdir/$_gitname"
-  rm -rf libswscale/
+#  rm -rf libswscale/
   git submodule init
   git submodule update
-
+
+  [ -d "$srcdir/$_gitname-build" ] && rm -rf "$srcdir/$_gitname-build"
+  cp -r "$srcdir/$_gitname" "$srcdir/$_gitname-build"
+  cd "$srcdir/$_gitname-build"
+
   _options=""
   [ ! -z $_xvidcore ] && _options="$_options --enable-libxvid"
   [ ! -z $_x264 ] && _options="$_options --enable-libx264"
@@ -67,8 +72,8 @@
   make doc/ff{mpeg,server}.1 || return 1
 }
 package(){
-  cd ${srcdir}/$_gitname
+  cd "$srcdir/$_gitname-build"
   make DESTDIR="$pkgdir" install || return 1
   make DESTDIR="$pkgdir" install-man || return 1
-  rm `find $pkgdir -name "*.a"`
+  rm `find "$pkgdir" -name "*.a"`
 }