Configure: Win32, store the path of peflags, since it will be provided by the contribs

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

configure.ac

@@ -341,9 +341,8 @@ case "${host_os}" in
         dnl
         AC_ARG_ENABLE(peflags,
           [  --enable-peflags        peflags use (default enabled on Windows)])
-        if test "${enable_peflags}" != "no"
-        then
-          AC_CHECK_TOOL(PEFLAGS, peflags, :)
+        if test "${enable_peflags}" != "no" ; then
+          AC_PATH_TOOL(PEFLAGS, peflags, :)
         fi
         AC_CHECK_PROGS(U2D, [unix2dos todos], unix2dos)
     fi