engine: make Mod_SampleSizeForFace accept const surface

engine/common/mod_bmodel.c

@@ -980,7 +980,7 @@ Mod_SampleSizeForFace
 return the current lightmap resolution per face
 ==================
 */
-int Mod_SampleSizeForFace( msurface_t *surf )
+int Mod_SampleSizeForFace( const msurface_t *surf )
 {
 	if( !surf || !surf->texinfo )
 		return LM_SAMPLE_SIZE;

engine/common/mod_local.h

@@ -155,7 +155,7 @@ int Mod_CheckLump( const char *filename, const int lump, int *lumpsize );
 int Mod_ReadLump( const char *filename, const int lump, void **lumpdata, int *lumpsize );
 int Mod_SaveLump( const char *filename, const int lump, void *lumpdata, int lumpsize );
 mleaf_t *Mod_PointInLeaf( const vec3_t p, mnode_t *node );
-int Mod_SampleSizeForFace( msurface_t *surf );
+int Mod_SampleSizeForFace( const msurface_t *surf );
 byte *Mod_GetPVSForPoint( const vec3_t p );
 void Mod_UnloadBrushModel( model_t *mod );
 void Mod_PrintWorldStats_f( void );

engine/ref_api.h

@@ -307,7 +307,7 @@ typedef struct ref_api_s
 	qboolean (*CL_AddVisibleEntity)( cl_entity_t *ent, int entityType );
 
 	// brushes
-	int (*Mod_SampleSizeForFace)( struct msurface_s *surf );
+	int (*Mod_SampleSizeForFace)( const struct msurface_s *surf );
 	qboolean (*Mod_BoxVisible)( const vec3_t mins, const vec3_t maxs, const byte *visbits );
 	struct world_static_s *(*GetWorld)( void ); // returns &world
 	mleaf_t *(*Mod_PointInLeaf)( const vec3_t p, mnode_t *node );