libweston: make weston_output::connection_internal a bool

It really is a boolean.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Armin Krezović <krezovic.armin@gmail.com>

libweston/compositor-drm.c

@@ -2653,7 +2653,7 @@ drm_output_enable(struct weston_output *base)
 	find_and_parse_output_edid(b, output, output->connector);
 	if (output->connector->connector_type == DRM_MODE_CONNECTOR_LVDS ||
 	    output->connector->connector_type == DRM_MODE_CONNECTOR_eDP)
-		output->base.connection_internal = 1;
+		output->base.connection_internal = true;
 
 	weston_plane_init(&output->cursor_plane, b->compositor,
 			  INT32_MIN, INT32_MIN);

libweston/compositor.h

@@ -223,7 +223,7 @@ struct weston_output {
 	void (*set_backlight)(struct weston_output *output, uint32_t value);
 	void (*set_dpms)(struct weston_output *output, enum dpms_enum level);
 
-	int connection_internal;
+	bool connection_internal;
 	uint16_t gamma_size;
 	void (*set_gamma)(struct weston_output *output,
 			  uint16_t size,