Convert all scales to int32_t

The type changed in the protocol, so update weston for this.
diff --git a/src/compositor-x11.c b/src/compositor-x11.c
index 279f1b3..3ed6af5 100644
--- a/src/compositor-x11.c
+++ b/src/compositor-x11.c
@@ -114,7 +114,7 @@
 	int			shm_id;
 	void		       *buf;
 	uint8_t			depth;
-	uint32_t                scale;
+	int32_t                 scale;
 };
 
 static struct xkb_keymap *
@@ -777,7 +777,7 @@
 x11_compositor_create_output(struct x11_compositor *c, int x, int y,
 			     int width, int height, int fullscreen,
 			     int no_input, char *configured_name,
-			     uint32_t transform, uint32_t scale)
+			     uint32_t transform, int32_t scale)
 {
 	static const char name[] = "Weston Compositor";
 	static const char class[] = "weston-1\0Weston Compositor";
diff --git a/src/compositor.c b/src/compositor.c
index f9bdb09..cb474d6 100644
--- a/src/compositor.c
+++ b/src/compositor.c
@@ -94,7 +94,7 @@
 static void
 weston_output_transform_init(struct weston_output *output, uint32_t transform);
 static void
-weston_output_scale_init(struct weston_output *output, uint32_t scale);
+weston_output_scale_init(struct weston_output *output, int32_t scale);
 
 WL_EXPORT int
 weston_output_switch_mode(struct weston_output *output, struct weston_mode *mode)
@@ -365,7 +365,7 @@
 WL_EXPORT void
 weston_transformed_coord(int width, int height,
 			 enum wl_output_transform transform,
-			 uint32_t scale,
+			 int32_t scale,
 			 float sx, float sy, float *bx, float *by)
 {
 	switch (transform) {
@@ -411,7 +411,7 @@
 WL_EXPORT pixman_box32_t
 weston_transformed_rect(int width, int height,
 			enum wl_output_transform transform,
-			uint32_t scale,
+			int32_t scale,
 			pixman_box32_t rect)
 {
 	float x1, x2, y1, y2;
@@ -1630,7 +1630,7 @@
 static void
 surface_set_buffer_scale(struct wl_client *client,
 			 struct wl_resource *resource,
-			 uint32_t scale)
+			 int32_t scale)
 {
 	struct weston_surface *surface = resource->data;
 
@@ -2669,7 +2669,7 @@
 }
 
 static void
-weston_output_scale_init(struct weston_output *output, uint32_t scale)
+weston_output_scale_init(struct weston_output *output, int32_t scale)
 {
         output->scale = scale;
 }
@@ -2689,7 +2689,7 @@
 WL_EXPORT void
 weston_output_init(struct weston_output *output, struct weston_compositor *c,
 		   int x, int y, int width, int height, uint32_t transform,
-		   uint32_t scale)
+		   int32_t scale)
 {
 	output->compositor = c;
 	output->x = x;
diff --git a/src/compositor.h b/src/compositor.h
index e3a798e..908cc5d 100644
--- a/src/compositor.h
+++ b/src/compositor.h
@@ -183,7 +183,7 @@
 	char *make, *model, *serial_number;
 	uint32_t subpixel;
 	uint32_t transform;
-	uint32_t scale;
+	int32_t scale;
 
 	struct weston_mode *current;
 	struct weston_mode *origin;
@@ -612,7 +612,7 @@
 		uint32_t buffer_transform;
 
 		/* wl_surface.set_buffer_scale */
-		uint32_t buffer_scale;
+		int32_t buffer_scale;
 	} cached;
 
 	int synchronized;
@@ -716,7 +716,7 @@
 
 	struct weston_buffer_reference buffer_ref;
 	uint32_t buffer_transform;
-	uint32_t buffer_scale;
+	int32_t buffer_scale;
 	int keep_buffer; /* bool for backends to prevent early release */
 
 	/* All the pending state, that wl_surface.commit will apply. */
@@ -744,7 +744,7 @@
 		uint32_t buffer_transform;
 
 		/* wl_surface.set_scaling_factor */
-		uint32_t buffer_scale;
+		int32_t buffer_scale;
 	} pending;
 
 	/*
@@ -1025,7 +1025,7 @@
 weston_output_move(struct weston_output *output, int x, int y);
 void
 weston_output_init(struct weston_output *output, struct weston_compositor *c,
-		   int x, int y, int width, int height, uint32_t transform, uint32_t scale);
+		   int x, int y, int width, int height, uint32_t transform, int32_t scale);
 void
 weston_output_destroy(struct weston_output *output);
 
@@ -1156,12 +1156,12 @@
 void
 weston_transformed_coord(int width, int height,
 			 enum wl_output_transform transform,
-			 uint32_t scale,
+			 int32_t scale,
 			 float sx, float sy, float *bx, float *by);
 pixman_box32_t
 weston_transformed_rect(int width, int height,
 			enum wl_output_transform transform,
-			uint32_t scale,
+			int32_t scale,
 			pixman_box32_t rect);
 
 #ifdef  __cplusplus