Use struct initializers instead of memset()

This is a bit more type-safe.

render/allocator/allocator.c

@@ -22,9 +22,10 @@
 void wlr_allocator_init(struct wlr_allocator *alloc,
 		const struct wlr_allocator_interface *impl, uint32_t buffer_caps) {
 	assert(impl && impl->destroy && impl->create_buffer);
-	memset(alloc, 0, sizeof(*alloc));
-	alloc->impl = impl;
-	alloc->buffer_caps = buffer_caps;
+	*alloc = (struct wlr_allocator){
+		.impl = impl,
+		.buffer_caps = buffer_caps,
+	};
 	wl_signal_init(&alloc->events.destroy);
 }
 

render/drm_format_set.c

@@ -86,8 +86,9 @@ bool wlr_drm_format_set_add(struct wlr_drm_format_set *set, uint32_t format,
 }
 
 void wlr_drm_format_init(struct wlr_drm_format *fmt, uint32_t format) {
-	memset(fmt, 0, sizeof(*fmt));
-	fmt->format = format;
+	*fmt = (struct wlr_drm_format){
+		.format = format,
+	};
 }
 
 bool wlr_drm_format_has(const struct wlr_drm_format *fmt, uint64_t modifier) {

render/gles2/texture.c

@@ -373,8 +373,9 @@ struct wlr_texture *gles2_texture_from_buffer(struct wlr_renderer *wlr_renderer,
 void wlr_gles2_texture_get_attribs(struct wlr_texture *wlr_texture,
 		struct wlr_gles2_texture_attribs *attribs) {
 	struct wlr_gles2_texture *texture = gles2_get_texture(wlr_texture);
-	memset(attribs, 0, sizeof(*attribs));
-	attribs->target = texture->target;
-	attribs->tex = texture->tex;
-	attribs->has_alpha = texture->has_alpha;
+	*attribs = (struct wlr_gles2_texture_attribs){
+		.target = texture->target,
+		.tex = texture->tex,
+		.has_alpha = texture->has_alpha,
+	};
 }

render/pass.c

@@ -15,8 +15,9 @@ struct wlr_render_pass_legacy {
 void wlr_render_pass_init(struct wlr_render_pass *render_pass,
 		const struct wlr_render_pass_impl *impl) {
 	assert(impl->submit && impl->add_texture && impl->add_rect);
-	memset(render_pass, 0, sizeof(*render_pass));
-	render_pass->impl = impl;
+	*render_pass = (struct wlr_render_pass){
+		.impl = impl,
+	};
 }
 
 bool wlr_render_pass_submit(struct wlr_render_pass *render_pass) {

render/swapchain.c

@@ -42,7 +42,7 @@ static void slot_reset(struct wlr_swapchain_slot *slot) {
 		wl_list_remove(&slot->release.link);
 	}
 	wlr_buffer_drop(slot->buffer);
-	memset(slot, 0, sizeof(*slot));
+	*slot = (struct wlr_swapchain_slot){0};
 }
 
 void wlr_swapchain_destroy(struct wlr_swapchain *swapchain) {

render/wlr_renderer.c

@@ -44,8 +44,9 @@ void wlr_renderer_init(struct wlr_renderer *renderer,
 	assert(impl->get_shm_texture_formats);
 	assert(impl->get_render_buffer_caps);
 
-	memset(renderer, 0, sizeof(*renderer));
-	renderer->impl = impl;
+	*renderer = (struct wlr_renderer){
+		.impl = impl,
+	};
 
 	wl_signal_init(&renderer->events.destroy);
 	wl_signal_init(&renderer->events.lost);

render/wlr_texture.c

@@ -10,11 +10,12 @@ void wlr_texture_init(struct wlr_texture *texture, struct wlr_renderer *renderer
 		const struct wlr_texture_impl *impl, uint32_t width, uint32_t height) {
 	assert(renderer);
 
-	memset(texture, 0, sizeof(*texture));
-	texture->renderer = renderer;
-	texture->impl = impl;
-	texture->width = width;
-	texture->height = height;
+	*texture = (struct wlr_texture){
+		.renderer = renderer,
+		.impl = impl,
+		.width = width,
+		.height = height,
+	};
 }
 
 void wlr_texture_destroy(struct wlr_texture *texture) {