Fixed many more bugs reported by Valgrind

drivers/gles3/rasterizer_scene_gles3.cpp

@@ -454,6 +454,7 @@ RID RasterizerSceneGLES3::reflection_atlas_create() {
 	ReflectionAtlas *reflection_atlas = memnew( ReflectionAtlas );
 	reflection_atlas->subdiv=0;
 	reflection_atlas->color=0;
+	reflection_atlas->size=0;
 	for(int i=0;i<6;i++) {
 		reflection_atlas->fbo[i]=0;
 	}
@@ -4576,6 +4577,9 @@ void RasterizerSceneGLES3::_generate_brdf() {
 
 void RasterizerSceneGLES3::initialize() {
 
+
+	render_pass=0;
+
 	state.scene_shader.init();
 
 	default_shader = storage->shader_create(VS::SHADER_SPATIAL);

drivers/gles3/rasterizer_storage_gles3.cpp

@@ -1476,9 +1476,11 @@ void RasterizerStorageGLES3::_update_shader(Shader* p_shader) const {
 			p_shader->spatial.depth_draw_mode=Shader::Spatial::DEPTH_DRAW_OPAQUE;
 			p_shader->spatial.cull_mode=Shader::Spatial::CULL_MODE_BACK;
 			p_shader->spatial.uses_alpha=false;
+			p_shader->spatial.uses_discard=false;
 			p_shader->spatial.unshaded=false;
 			p_shader->spatial.ontop=false;
 			p_shader->spatial.uses_sss=false;
+			p_shader->spatial.uses_vertex=false;
 
 			shaders.actions_scene.render_mode_values["blend_add"]=Pair<int*,int>(&p_shader->spatial.blend_mode,Shader::Spatial::BLEND_MODE_ADD);
 			shaders.actions_scene.render_mode_values["blend_mix"]=Pair<int*,int>(&p_shader->spatial.blend_mode,Shader::Spatial::BLEND_MODE_MIX);
@@ -1501,6 +1503,7 @@ void RasterizerStorageGLES3::_update_shader(Shader* p_shader) const {
 			shaders.actions_scene.usage_flag_pointers["VERTEX"]=&p_shader->spatial.uses_vertex;
 
 			shaders.actions_scene.usage_flag_pointers["SSS_STRENGTH"]=&p_shader->spatial.uses_sss;
+			shaders.actions_scene.usage_flag_pointers["DISCARD"]=&p_shader->spatial.uses_discard;
 
 			actions=&shaders.actions_scene;
 			actions->uniforms=&p_shader->uniforms;

drivers/gles3/shader_compiler_gles3.cpp

@@ -579,6 +579,7 @@ Error ShaderCompilerGLES3::compile(VS::ShaderMode p_mode, const String& p_code,
 	r_gen_code.uses_vertex_time=false;
 
 
+
 	used_name_defines.clear();
 	used_rmode_defines.clear();
 

scene/main/viewport.cpp

@@ -2760,7 +2760,7 @@ Viewport::Viewport() {
 
 	shadow_atlas_size=0;
 	for(int i=0;i<4;i++) {
-		shadow_atlas_quadrant_subdiv[0]=SHADOW_ATLAS_QUADRANT_SUBDIV_MAX;
+		shadow_atlas_quadrant_subdiv[i]=SHADOW_ATLAS_QUADRANT_SUBDIV_MAX;
 	}
 	set_shadow_atlas_quadrant_subdiv(0,SHADOW_ATLAS_QUADRANT_SUBDIV_4);
 	set_shadow_atlas_quadrant_subdiv(1,SHADOW_ATLAS_QUADRANT_SUBDIV_4);

servers/visual/visual_server_viewport.h

@@ -71,6 +71,7 @@ public:
 			disable_environment=false;
 			viewport_to_screen=0;
 			shadow_atlas_size=0;
+			disable_3d=false;
 
 		}
 	};