osdmenu: fix data path on Linux

Optimize for installed VLC rather than running from $(top_srcdir).
This patch does not support relocation, so there is potential for
further improvements.

modules/video_filter/Modules.am

 SUBDIRS = dynamicoverlay
+
 SOURCES_mosaic = mosaic.c mosaic.h
 SOURCES_transform = transform.c
 SOURCES_invert = invert.c
@@ -25,7 +26,13 @@ SOURCES_scale = scale.c
 SOURCES_marq = marq.c
 SOURCES_rss = rss.c
 SOURCES_motiondetect = motiondetect.c
-SOURCES_osdmenu = osdmenu.c
+
+libosdmenu_plugin_la_SOURCES = osdmenu.c
+libosdmenu_plugin_la_CFLAGS = $(AM_CFLAGS) -DPKGDATADIR=\"$(vlcdatadir)\"
+libosdmenu_plugin_la_LIBADD = $(AM_LIBADD)
+libosdmenu_plugin_la_DEPENDENCIES =
+EXTRA_LTLIBRARIES += libosdmenu_plugin.la
+
 SOURCES_remoteosd = remoteosd.c remoteosd_rfbproto.h
 SOURCES_magnify = magnify.c
 SOURCES_wave = wave.c

modules/video_filter/osdmenu.c

@@ -106,7 +106,7 @@ static int MouseEvent( filter_t *,
 #if defined( WIN32 ) || defined( UNDER_CE )
 #define OSD_DEFAULT_CFG "osdmenu/default.cfg"
 #else
-#define OSD_DEFAULT_CFG "share/osdmenu/default.cfg"
+#define OSD_DEFAULT_CFG PKGDATADIR"/osdmenu/default.cfg"
 #endif
 
 #define OSD_UPDATE_MIN     0