Fix T90695: Lower tile splitting limit for lineart

Lowers tile splitting limit so models with extremely dense mesh
portions could still have reasonable performance while for more
common cases the performance impact should be minimal.

Reviewed By: Sebastian Parborg (zeddb), Antonio Vazquez (antoniov)

Differential Revision: https://developer.blender.org/D12236

source/blender/gpencil_modifiers/intern/lineart/MOD_lineart.h

@@ -208,7 +208,7 @@ typedef struct LineartChainRegisterEntry {
 enum eLineArtTileRecursiveLimit {
   /* If tile gets this small, it's already much smaller than a pixel. No need to continue
    * splitting. */
-  LRT_TILE_RECURSIVE_PERSPECTIVE = 30,
+  LRT_TILE_RECURSIVE_PERSPECTIVE = 16,
   /* This is a tried-and-true safe value for high poly models that also needed ortho rendering. */
   LRT_TILE_RECURSIVE_ORTHO = 10,
 };