- added editmesh_[de]select_by_material function

- added mesh_set_smooth_flag, mesh_delete_material_index function
 - isolated some globals
 - got rid of reliance on meshdata in buttons_editing.c and material.c

source/blender/src/editface.c

@@ -95,6 +95,7 @@
 #include "BSE_trans_types.h"
 #endif /* NAN_TPT */
 
+static cumapsize= 1.0;
 TFace *lasttface=0;
 
 void set_lasttface()
@@ -633,7 +634,6 @@ void uv_autocalc_tface()
 	MFace *mface;
 	MVert *mv;
 	Object *ob;
-	extern float cumapsize;	/* buttons.c */
 	float dx, dy, min[3], cent[3], max[3], no[3], *loc, mat[4][4];
 	float fac = 1.0;