Use test instead of [ because that's an m4 quote character

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%404000

configure.in

@@ -604,7 +604,7 @@ AC_HELP_STRING([--enable-alsa-shared], [dynamically load ALSA audio support [[de
                 fi
             fi
             alsa_lib_spec=`echo $ALSA_LIBS | sed 's/.*-L\([[^ ]]*\).*/\1\/libasound.so.*/'`
-            if [ x$alsa_lib_spec = x ]; then
+            if test x$alsa_lib_spec = x; then
                 alsa_lib_spec="/usr/$base_libdir/libasound.so.*"
             fi
             alsa_lib=`ls -- $alsa_lib_spec | sed 's/.*\/\(.*\)/\1/; q'`
@@ -703,7 +703,7 @@ AC_HELP_STRING([--enable-esd], [support the Enlightened Sound Daemon [[default=y
 AC_HELP_STRING([--enable-esd-shared], [dynamically load ESD audio support [[default=yes]]]),
                           , enable_esd_shared=yes)
             esd_lib_spec=`echo $ESD_LIBS | sed 's/.*-L\([[^ ]]*\).*/\1\/libesd.so.*/'`
-            if [ x$esd_lib_spec = x ]; then
+            if test x$esd_lib_spec = x; then
                 esd_lib_spec="/usr/$base_libdir/libesd.so.*"
             fi
             esd_lib=`ls -- $esd_lib_spec | sed 's/.*\/\(.*\)/\1/; q'`
@@ -763,7 +763,7 @@ AC_HELP_STRING([--enable-pulseaudio-shared], [dynamically load PulseAudio suppor
                 fi
             fi
             pulseaudio_lib_spec=`echo $PULSEAUDIO_LIBS | sed 's/.*-L\([[^ ]]*\).*/\1\/libpulse-simple.so.*/'`
-            if [ x$pulse_lib_spec = x ]; then
+            if test x$pulse_lib_spec = x; then
                 pulse_lib_spec="/usr/$base_libdir/libpulse-simple.so.*"
             fi
             pulseaudio_lib=`ls -- $pulseaudio_lib_spec | sed 's/.*\/\(.*\)/\1/; q'`
@@ -886,7 +886,7 @@ AC_HELP_STRING([--enable-nas-shared], [dynamically load NAS audio support [[defa
                 fi
             fi
             nas_lib_spec=`echo $NAS_LIBS | sed 's/.*-L\([[^ ]]*\).*/\1\/libaudio.so.*/'`
-            if [ x$nas_lib_spec = x ]; then
+            if test x$nas_lib_spec = x; then
                 nas_lib_spec="/usr/$base_libdir/libaudio.so.*"
             fi
             nas_lib=`ls -- $nas_lib_spec | sed 's/.*\/\(.*\)/\1/; q'`