spearmint: Revert polygonOffset to use Quake 3 values

I changed polygonOffset to use Doom 3 values for glPolygonOffset() to
reduce Z-fighting of wall marks. However it breaks drawing the map
rustgrad.

Author: zturtleman

code/renderergl1/tr_init.c

@@ -1217,8 +1217,8 @@ void R_Register( void )
 	r_shownormals = ri.Cvar_Get ("r_shownormals", "0", CVAR_CHEAT);
 	r_bonesDebug = ri.Cvar_Get ("r_bonesDebug", "0", CVAR_CHEAT);
 	r_clear = ri.Cvar_Get ("r_clear", "0", CVAR_CHEAT);
-	r_offsetFactor = ri.Cvar_Get( "r_offsetfactor", "0", CVAR_CHEAT );
-	r_offsetUnits = ri.Cvar_Get( "r_offsetunits", "-600", CVAR_CHEAT );
+	r_offsetFactor = ri.Cvar_Get( "r_offsetfactor", "-1", CVAR_CHEAT );
+	r_offsetUnits = ri.Cvar_Get( "r_offsetunits", "-2", CVAR_CHEAT );
 	r_drawBuffer = ri.Cvar_Get( "r_drawBuffer", "GL_BACK", CVAR_CHEAT );
 	r_lockpvs = ri.Cvar_Get ("r_lockpvs", "0", CVAR_CHEAT);
 	r_noportals = ri.Cvar_Get ("r_noportals", "0", CVAR_CHEAT);

code/renderergl2/tr_init.c

@@ -1504,8 +1504,8 @@ void R_Register( void )
 	r_shownormals = ri.Cvar_Get ("r_shownormals", "0", CVAR_CHEAT);
 	r_bonesDebug = ri.Cvar_Get ("r_bonesDebug", "0", CVAR_CHEAT);
 	r_clear = ri.Cvar_Get ("r_clear", "0", CVAR_CHEAT);
-	r_offsetFactor = ri.Cvar_Get( "r_offsetfactor", "0", CVAR_CHEAT );
-	r_offsetUnits = ri.Cvar_Get( "r_offsetunits", "-600", CVAR_CHEAT );
+	r_offsetFactor = ri.Cvar_Get( "r_offsetfactor", "-1", CVAR_CHEAT );
+	r_offsetUnits = ri.Cvar_Get( "r_offsetunits", "-2", CVAR_CHEAT );
 	r_drawBuffer = ri.Cvar_Get( "r_drawBuffer", "GL_BACK", CVAR_CHEAT );
 	r_lockpvs = ri.Cvar_Get ("r_lockpvs", "0", CVAR_CHEAT);
 	r_noportals = ri.Cvar_Get ("r_noportals", "0", CVAR_CHEAT);