makechrootpkg: Stat chrootdir type after existancy

Move detection of chrootdir type after have check if the directory exists.

This avoid the following messages when -r is not given
stat: cannot read file system information for '': No such file or directory

Signed-off-by: Sébastien Luttringer <seblu@seblu.net>
Signed-off-by: Pierre Schmitz <pierre@archlinux.de>

makechrootpkg.in

@@ -78,9 +78,6 @@ done
 # Canonicalize chrootdir, getting rid of trailing /
 chrootdir=$(readlink -e "$passeddir")
 
-# Detect chrootdir filesystem type
-chroottype=$(stat -f -c %T "$chrootdir")
-
 if [[ ${copy:0:1} = / ]]; then
 	copydir=$copy
 else
@@ -117,6 +114,9 @@ fi
 
 umask 0022
 
+# Detect chrootdir filesystem type
+chroottype=$(stat -f -c %T "$chrootdir")
+
 # Lock the chroot we want to use. We'll keep this lock until we exit.
 # Note this is the same FD number as in mkarchroot
 exec 9>"$copydir.lock"