From 3a0d046f7e7b2873f5bf393b39358fc95361c088 Mon Sep 17 00:00:00 2001
From: Randy Heit <rheit@users.noreply.github.com>
Date: Sat, 23 Apr 2016 21:29:40 -0500
Subject: [PATCH] Fix rendering with SW 2D: modf usage was backwards

---
 src/v_draw.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/v_draw.cpp b/src/v_draw.cpp
index dccbfdc93..c7b62b0a6 100644
--- a/src/v_draw.cpp
+++ b/src/v_draw.cpp
@@ -204,8 +204,7 @@ void DCanvas::DrawTextureParms(FTexture *img, DrawParms &parms)
 
 		// There is not enough precision in the drawing routines to keep the full
 		// precision for y0. :(
-		double dummy;
-		sprtopscreen = modf(y0, &dummy);
+		modf(y0, &sprtopscreen);
 
 		double yscale = parms.destheight / img->GetHeight();
 		double iyscale = 1 / yscale;