Fix: EEVEE missing break in switch case

this was working because the following cases overwrite the previous set,
but it's still better to have a `break`.

source/blender/draw/engines/eevee_next/shaders/eevee_light_eval_lib.glsl

@@ -63,13 +63,16 @@ void closure_light_set(inout ClosureLightStack stack, int index, ClosureLight cl
   switch (index) {
     case 0:
       stack.cl[0] = cl_light;
+      break;
 #if LIGHT_CLOSURE_EVAL_COUNT > 1
     case 1:
       stack.cl[1] = cl_light;
+      break;
 #endif
 #if LIGHT_CLOSURE_EVAL_COUNT > 2
     case 2:
       stack.cl[2] = cl_light;
+      break;
 #endif
 #if LIGHT_CLOSURE_EVAL_COUNT > 3
 #  error