- implemented per-sidedef texture scaling for GL renderer.

Update to ZDoom r1648:

- added Gez's infinite ammo powerup and random spawner fix patches.
- reduced size of Hexen's flames to fix bug in Deathkings MAP01.
- added checks for sidedef scaling values 
- Added Karate Chris's poison cloud fix.
- Added per-tier texture scaling with these new UDMF sidedef properties:
  * scalex_top
  * scaley_top
  * scalex_mid
  * scaley_mid
  * scalex_bottom
  * scalex_bottom
- Added sidedef versions of the linedef flags wrapmidtex and clipmidtex (via
  UDMF; names are the same). If the flag is set on the line, it applies to
  both sides. Otherwise, each side can control them individually.


git-svn-id: http://mancubus.net/svn/hosted/gzdoom/trunk@340 b0f79afe-0144-0410-b225-9a4edf0717df

src/r_plane.cpp

@@ -865,8 +865,8 @@ static void R_DrawSky (visplane_t *pl)
 		{
 			lastskycol[x] = 0xffffffff;
 		}
-		wallscan (pl->minx, pl->maxx, (short *)pl->top, (short *)pl->bottom, swall, lwall, 
-			backskytex == NULL ? R_GetOneSkyColumn : R_GetTwoSkyColumns);
+		wallscan (pl->minx, pl->maxx, (short *)pl->top, (short *)pl->bottom, swall, lwall,
+			frontyScale, backskytex == NULL ? R_GetOneSkyColumn : R_GetTwoSkyColumns);
 	}
 	else
 	{ // The texture does not tile nicely
@@ -906,7 +906,7 @@ static void R_DrawSkyStriped (visplane_t *pl)
 		{
 			lastskycol[x] = 0xffffffff;
 		}
-		wallscan (pl->minx, pl->maxx, top, bot, swall, lwall, 
+		wallscan (pl->minx, pl->maxx, top, bot, swall, lwall, frontyScale,
 			backskytex == NULL ? R_GetOneSkyColumn : R_GetTwoSkyColumns);
 		yl = yh;
 		yh += drawheight;