ML: try to unbreak configure when libsqlite3-dev isn't present

configure.ac

@@ -4164,13 +4164,19 @@ AM_CONDITIONAL([HAVE_SQLITE], [test "${enable_sqlite}" != "no"])
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 dnl media library
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-AC_ARG_ENABLE(media-library, [--enable-media-library media library (default enabled)])
-if test "${enable_media_library}" != "no"
-then
-  test "${enable_sqlite}" != "yes" && AC_MSG_ERROR([SQLite module is required for the media library])
-  AC_DEFINE([MEDIA_LIBRARY], 1, [Define if you want to use the VLC media library])
-  VLC_ADD_CPPFLAGS([qt4],"-DMEDIA_LIBRARY")
-  VLC_ADD_PLUGIN([media_library])
+AC_ARG_ENABLE(media-library, [--enable-media-library media library (default auto)])
+if test "${enable_media_library}" != "no"; then
+    if test "${enable_sqlite}" != "yes"; then
+        if test "${enable_media_library}" == "yes"; then
+            AC_MSG_ERROR([SQLite module is required for the media library])
+        else
+            AC_MSG_WARN([SQLite module is required for the media library])
+        fi
+    else
+       AC_DEFINE([MEDIA_LIBRARY], 1, [Define if you want to use the VLC media library])
+       VLC_ADD_CPPFLAGS([qt4],"-DMEDIA_LIBRARY")
+       VLC_ADD_PLUGIN([media_library])
+    fi
 fi
 
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