configure: fix warnings in sdl check
correct shell syntax, drop trailing ','
@@ -440,7 +440,7 @@ AS_IF([test "x$enable_sdl" != "xno"], [
CLEAR_LIBVARS([SDL])
WITHLIB_OPTION([sdl], [SDL])
- $sdl_header = "no";
+ sdl_header="no"
LIBCHECK_PROLOGUE([SDL])
AC_CHECK_HEADER([SDL/SDL.h], [sdl_header="SDL_SDL.h"],
[AC_CHECK_HEADER([SDL.h], [sdl_header="SDL.h"],
@@ -454,8 +454,8 @@ AS_IF([test "x$enable_sdl" != "xno"], [
sdl_support=yes
],
AC_MSG_WARN(Optional SDL library not found),
- [$MATH_LIBS]),
- if test x"$sdl_header" == "xSDL.h" ; then
+ [$MATH_LIBS])
+ if test x"$sdl_header" = "xSDL.h"; then
SDL_INCLUDES="$SDL_INCLUDES -DWEBP_HAVE_JUST_SDL_H"
fi
fi
