[Bf-blender-cvs] [cbb6013] master: Error in last commit

[Campbell Barton]

Commit: cbb601346a6401192298b34255f7f3c981078293
Author: Campbell Barton
Date:   Wed Apr 29 05:36:39 2015 +1000
Branches: master
https://developer.blender.org/rBcbb601346a6401192298b34255f7f3c981078293

Error in last commit

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M	source/blender/editors/screen/glutil.c

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diff --git a/source/blender/editors/screen/glutil.c b/source/blender/editors/screen/glutil.c
index ca0047b..2a0e13b 100644
--- a/source/blender/editors/screen/glutil.c
+++ b/source/blender/editors/screen/glutil.c
@@ -1015,7 +1015,7 @@ void bglPolygonOffset(float UNUSED(viewdist), float dist)
 			if (depth_fac == 0.0f) {
 				int depthbits;
 				glGetIntegerv(GL_DEPTH_BITS, &depthbits);
-				depth_fac = 1.0f / (float)(depthbits - 1);
+				depth_fac = 1.0f / (float)((1 << depthbits) - 1);
 			}
 			offs = (-1.0 / winmat[10]) * dist * depth_fac;
 #endif