[istanbul] Fix autoreconf.

[Zaheer Abbas Merali <zaheerm src gnome org>]

commit 5e995c2eb6c7e88b0030e397cc4d3b256d3ded6c
Author: Michael Wolf <maw pobox com>
Date:   Sat Mar 20 17:04:54 2010 +0100

    Fix autoreconf.
    
    Fixes bug #533159

 common/gst-feature.m4 |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/common/gst-feature.m4 b/common/gst-feature.m4
index 4119fc1..9f1c625 100644
--- a/common/gst-feature.m4
+++ b/common/gst-feature.m4
@@ -46,13 +46,13 @@ dnl                 that were checked through GST_CHECK_FEATURE
 dnl GST_PLUGINS_NO will contain those that won't be built
 
 AC_DEFUN([GST_CHECK_FEATURE],
-echo
+[echo
 AC_MSG_NOTICE(*** checking feature: [$2] ***)
 if test "x[$3]" != "x"
 then
   AC_MSG_NOTICE(*** for plug-ins: [$3] ***)
 fi
-[dnl
+dnl
 builtin(define, [gst_endisable], ifelse($5, [disabled], [enable], [disable]))dnl
 dnl if it is set to NO, then don't even consider it for building
 NOUSE=