From a370f32c154e0c3e724f222a6053e60e5cd1019c Mon Sep 17 00:00:00 2001
From: frosch <frosch@openttd.org>
Date: Sun, 28 Sep 2008 12:38:56 +0000
Subject: [PATCH] (svn r14409) -Codechange: Simplify a loop and correct a
 comment.

---
 src/viewport.cpp | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/src/viewport.cpp b/src/viewport.cpp
index ba4d44f820..ae7df8a6e3 100644
--- a/src/viewport.cpp
+++ b/src/viewport.cpp
@@ -1333,15 +1333,12 @@ static void ViewportSortParentSprites(ParentSpriteToSortVector *psdv)
 				}
 			}
 
-			/* Swap the two sprites ps and ps2 using bubble-sort algorithm. */
-			ParentSpriteToDraw **psd3 = psd;
-			do {
-				ParentSpriteToDraw *temp = *psd3;
-				*psd3 = ps2;
-				ps2 = temp;
-
-				psd3++;
-			} while (psd3 <= psd2);
+			/* Move ps2 in front of ps */
+			ParentSpriteToDraw *temp = ps2;
+			for (ParentSpriteToDraw **psd3 = psd2; psd3 > psd; psd3--) {
+				*psd3 = *(psd3 - 1);
+			}
+			*psd = temp;
 		}
 	}
 }