Add missing space

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6194 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/configure b/configure
index 1e36cf4..e1bcafa 100755
--- a/configure
+++ b/configure
@@ -635,7 +635,7 @@
     fi
 # the following are Darwin specific
     if [ "$darwin_user" = "yes" ] ; then
-        target_list="$target_list i386-darwin-user ppc-darwin-user"
+        target_list="$target_list i386-darwin-user ppc-darwin-user "
     fi
 # the following are BSD specific
     if [ "$bsd_user" = "yes" ] ; then