Revert "Fix configuration of webp libraries"

This reverts commit de4277af009115ceba7fe920163c05c608ea9524.
It breaks WebP support at least on my system.
There's no reason to require libwebpdecoder library to be
installed, since we don't use the functions from it, at least
not in libwebp 1.2.1.

diff --git a/configure.ac b/configure.ac
index 2787370fbff028e15a8c965fafe2023c296ac505..bc7e61048c3b031c77df06259d15df4484f38fbf 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -2803,8 +2803,7 @@ if test "${with_webp}" != "no"; then
    || test "${HAVE_W32}" = "yes" || test "${HAVE_NS}" = "yes" \
    || test "${HAVE_BE_APP}" = "yes" || test "${HAVE_PGTK}" = "yes"; then
       WEBP_REQUIRED=0.6.0
-      WEBP_MODULE="libwebpdemux >= $WEBP_REQUIRED \
-                   libwebpdecoder >= $WEBP_REQUIRED"
+      WEBP_MODULE="libwebpdemux >= $WEBP_REQUIRED"
 
       EMACS_CHECK_MODULES([WEBP], [$WEBP_MODULE])
       AC_SUBST([WEBP_CFLAGS])