Fix some unincialised variables

drivers/gles3/rasterizer_storage_gles3.h

@@ -297,6 +297,7 @@ public:
 				target(GL_TEXTURE_2D),
 				data_size(0),
 				compressed(false),
+				srgb(false),
 				total_data_size(0),
 				ignore_mipmaps(false),
 				mipmaps(0),

modules/stb_vorbis/audio_stream_ogg_vorbis.cpp

@@ -273,6 +273,7 @@ void AudioStreamOGGVorbis::_bind_methods() {
 AudioStreamOGGVorbis::AudioStreamOGGVorbis() {
 
 	data = NULL;
+	data_len = 0;
 	length = 0;
 	sample_rate = 1;
 	channels = 1;

scene/3d/proximity_group.cpp

@@ -204,6 +204,7 @@ ProximityGroup::ProximityGroup() {
 	group_version = 0;
 	dispatch_mode = MODE_PROXY;
 
+	cell_size = 1.0;
 	grid_radius = Vector3(1, 1, 1);
 	set_notify_transform(true);
 };

scene/animation/animation_tree.cpp

@@ -1580,6 +1580,7 @@ AnimationTree::AnimationTree() {
 	active = false;
 	cache_valid = false;
 	setup_pass = 1;
+	process_pass = 1;
 	started = true;
 	properties_dirty = true;
 	last_animation_player = 0;

scene/gui/slider.cpp

@@ -295,6 +295,7 @@ Slider::Slider(Orientation p_orientation) {
 	mouse_inside = false;
 	grab.active = false;
 	ticks = 0;
+	ticks_on_borders = false;
 	custom_step = -1;
 	editable = true;
 	scrollable = true;

servers/visual/visual_server_raster.cpp

@@ -201,8 +201,10 @@ VisualServerRaster::VisualServerRaster() {
 	VSG::canvas_render = VSG::rasterizer->get_canvas();
 	VSG::scene_render = VSG::rasterizer->get_scene();
 
-	for (int i = 0; i < 4; i++)
+	for (int i = 0; i < 4; i++) {
 		black_margin[i] = 0;
+		black_image[i] = RID();
+	}
 }
 
 VisualServerRaster::~VisualServerRaster() {