setup: Use Emacs 22 for compiling, if it's available.

The binary formats actually seem compatible, though.

diff --git a/setup b/setup
index 16ad5fb..00b7a41 100755 (executable)
--- a/setup
+++ b/setup
@@ -192,7 +192,7 @@ echo "      all done."
 ### Set up the Emacs config
 $echon "Finding a suitable emacs:$echoc"
 emacs=no
-for i in emacs21 emacs; do
+for i in emacs22 emacs21 emacs; do
   if type -p >/dev/null $i; then
     emacs=$i
     break