[Bf-blender-cvs] [63ea0f7581f] master: BLI_bitmap: fix _BITMAP_NUM_BLOCKS to not over-count by one block

[Aras Pranckevicius]

Commit: 63ea0f7581faeeb629b040b7a4dc661bc84c789c
Author: Aras Pranckevicius
Date:   Fri Jul 15 10:21:27 2022 +0300
Branches: master
https://developer.blender.org/rB63ea0f7581faeeb629b040b7a4dc661bc84c789c

BLI_bitmap: fix _BITMAP_NUM_BLOCKS to not over-count by one block

For bit counts that were exact multiple of block size, the macro was
computing one block too much.

Reviewed By: Campbell Barton, Bastien Montagne
Differential Revision: https://developer.blender.org/D15454

===================================================================

M	source/blender/blenlib/BLI_bitmap.h

===================================================================

diff --git a/source/blender/blenlib/BLI_bitmap.h b/source/blender/blenlib/BLI_bitmap.h
index 26dc6c7ffc9..973cc5c3d1e 100644
--- a/source/blender/blenlib/BLI_bitmap.h
+++ b/source/blender/blenlib/BLI_bitmap.h
@@ -27,7 +27,7 @@ typedef unsigned int BLI_bitmap;
 /**
  * Number of blocks needed to hold '_num' bits.
  */
-#define _BITMAP_NUM_BLOCKS(_num) (((_num) >> _BITMAP_POWER) + 1)
+#define _BITMAP_NUM_BLOCKS(_num) (((_num) + _BITMAP_MASK) >> _BITMAP_POWER)
 
 /**
  * Size (in bytes) used to hold '_num' bits.