do nothing in restore_flags() if flags are not saved

Originally committed as revision 7918 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 1 insertions, 0 deletions

diff --git a/configure b/configure
index 102ba6c40b..58edcbd33a 100755
--- a/configure
+++ b/configure
@@ -291,6 +291,7 @@ save_flags(){
 }
 
 restore_flags(){
+    flags_saved || return
     CFLAGS="$SAVE_CFLAGS"
     LDFLAGS="$SAVE_LDFLAGS"
     extralibs="$SAVE_extralibs"