Fix #112041: EEVEE-Next: Distant tranparent object shadow tagging

Ensure dist_to_light is >0.
Otherwise the log2 in lod selection falls into undefined behavior.

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

@@ -89,7 +89,7 @@ void shadow_tag_usage_tilemap_punctual(
   }
 
   vec3 lP = light_world_to_local(light, P - light._position);
-  float dist_to_light = length(lP) - radius;
+  float dist_to_light = max(length(lP) - radius, 1e-5);
   if (dist_to_light > light.influence_radius_max) {
     return;
   }