Disable blood on HUD when com_blood is 0.

code/cgame/cg_view.c

@@ -556,6 +556,10 @@ static void CG_DamageBlendBlob( void ) {
 	int			maxTime;
 	refEntity_t		ent;
 
+	if (!cg_blood.integer) {
+		return;
+	}
+
 	if ( !cg.damageValue ) {
 		return;
 	}