[renderer] Fix a comment typo and add a fixme

libs/video/renderer/glsl/quakeforge.glsl

@@ -598,7 +598,7 @@ in vec2 uv;
 void
 main ()
 {
-	// slight offset on y is to avoid the singularity straight aheat
+	// slight offset on y is to avoid the singularity straight ahead
 	vec2        xy = (2.0 * uv - vec2 (1, 1.00002)) * (vec2(1, -aspect));
 	float       r = sqrt (dot (xy, xy));
 	vec2        cs = vec2 (cos (r * fov), sin (r * fov));

libs/video/renderer/sw/sw_rmain.c

@@ -184,6 +184,8 @@ reset_sw_components (ecs_registry_t *reg)
 		pool->count = 0;	// remove component from every entity
 		// reserve first component object (render id 0) for the world
 		// pseudo-entity.
+		//FIXME takes advantage of the lack of checks for the validity of the
+		//entity id.
 		Ent_SetComponent (0, sw_comps[i], reg, 0);
 		// make sure entity 0 gets allocated a new component object as the
 		// world pseudo-entity currently has no actual entity (FIXME)