build: Fix vala.m4

 - Don't accumulate checks
 - Remove ugly leading white-space

diff --git a/m4/vala.m4 b/m4/vala.m4
index 3735948..4e74625 100644 (file)
--- a/m4/vala.m4
+++ b/m4/vala.m4
@@ -41,10 +41,12 @@ _ACEOF
 #
 AC_DEFUN([VALA_CHECK_PACKAGES],
 [
+  unset vala_pkgs
+  unset vala_bindings
   ac_save_ifs="$IFS"; unset IFS
   for vala_pkg in $(echo "$1"); do
-      vala_pkgs="$vala_pkgs --pkg $vala_pkg"
-      vala_bindings="$vala_bindings $vala_pkg"
+      vala_pkgs="${vala_pkgs:+$vala_pkgs }--pkg $vala_pkg"
+      vala_bindings="${vala_bindings:+$vala_bindings }$vala_pkg"
   done
   IFS="$ac_save_ifs"
   AC_MSG_CHECKING([for $vala_bindings vala bindings])