* cosmetics -- force "command not found" not to be printed

Originally committed as revision 3335 to svn://svn.ffmpeg.org/ffmpeg/trunk

configure

@@ -889,7 +889,7 @@ EOF
 
 freetype2=no
 if test "x$targetos" != "xBeOS" && test "$os2" != "yes"; then
-  if freetype-config --version >/dev/null 2>&1 ; then
+  if (freetype-config --version) >/dev/null 2>&1 ; then
     if $cc -o $TMPE $TMPC `freetype-config --cflags` `freetype-config --libs`  > /dev/null 2>&1 ; then
       freetype2=yes
     fi
@@ -907,7 +907,7 @@ EOF
 
 sdl_too_old=no
 sdl=no
-if sdl-config --version >/dev/null 2>&1 ; then
+if (sdl-config --version) >/dev/null 2>&1 ; then
 if $cc -o $TMPE `sdl-config --cflags` $TMPC `sdl-config --libs`  > /dev/null 2>&1  ; then
 _sdlversion=`sdl-config --version | sed 's/[^0-9]//g'`
 if test "$_sdlversion" -lt 121 ; then
@@ -922,7 +922,7 @@ fi
 # texi2html probe
 
 texi2html=no
-if texi2html -version >/dev/null 2>&1; then
+if (texi2html -version) >/dev/null 2>&1; then
 texi2html=yes
 fi