configure: Fix -t screen:help not printing compiled modules on linux

The output is based on HAVE_SCREEN_X11 & HAVE_SCREEN_PW macros, but those were not defined anywhere

Author: mpiatka

configure.ac

@@ -2288,6 +2288,7 @@ if test "$system" = Linux && test $screen_cap_req != no && test $screen_cap_req
                 fi
                 add_module vidcap_screen_x11 "src/video_capture/screen_x11.o src/x11_common.o" "$SCREEN_CAP_LIB"
                 screen_modules="${screen_modules:+$screen_modules,}X11"
+                AC_DEFINE([HAVE_SCREEN_X11], [1],  [Build with X11 screencast support])
         fi
 fi
 
@@ -2308,7 +2309,7 @@ if test $found_screen_screen_pw_deps = yes && test $pipewire_video = yes; then
 
         INC="$INC $SCREEN_CAP_PIPEWIRE_INC"
         CXXFLAGS="$CXXFLAGS $SCREEN_CAP_PIPEWIRE_INC"
-        AC_DEFINE([HAVE_DBUS_SCREENCAST], [1],  [Build with pipewire screencast dbus support])
+        AC_DEFINE([HAVE_SCREEN_PW], [1],  [Build with pipewire screencast dbus support])
 
         PIPEWIRE_CAP_LIBS="$PIPEWIRE_CAP_LIBS $SCREEN_CAP_PIPEWIRE_LIBS"
         PIPEWIRE_CAP_OBJS="$PIPEWIRE_CAP_OBJS src/utils/dbus_portal.o"

src/video_capture/pipewire.cpp

@@ -527,7 +527,7 @@ static int parse_params(const struct vidcap_params *params, vcap_pw_state *s) {
         return VIDCAP_INIT_OK;
 }
 
-#ifdef HAVE_DBUS_SCREENCAST
+#ifdef HAVE_SCREEN_PW
 static int vidcap_screen_pw_init(const struct vidcap_params *params, void **state)
 {
         if (vidcap_params_get_flags(params) & VIDCAP_FLAG_AUDIO_ANY) {
@@ -629,7 +629,7 @@ static video_frame *vidcap_pw_grab(void *state, struct audio_frame **audio)
         return s->in_flight_frame.get();
 }
 
-#ifdef HAVE_DBUS_SCREENCAST
+#ifdef HAVE_SCREEN_PW
 
 static const struct video_capture_info vidcap_screen_pw_info = {
         vidcap_screen_pw_probe,