# HG changeset patch
# User yexo <yexo@openttd.org>
# Date 1271791529 0
# Node ID 4ae8e013d8e4ca65b1f87f67b16db36aadcf33fd
# Parent  ce5efb7cc2ce690d4139ebd4d5736d70d464b7ea
(svn r19685) -Fix (r19679): off-by-one error

diff --git a/src/newgrf.cpp b/src/newgrf.cpp
--- a/src/newgrf.cpp
+++ b/src/newgrf.cpp
@@ -2082,7 +2082,7 @@
 		return CIR_INVALID_ID;
 	}
 
-	if (sid + numinfo - ORIGINAL_SAMPLE_COUNT >= _cur_grffile->num_sounds) {
+	if (sid + numinfo - ORIGINAL_SAMPLE_COUNT > _cur_grffile->num_sounds) {
 		grfmsg(1, "SoundEffectChangeInfo: Attemting to change undefined sound effect (%u), max (%u). Ignoring.", sid + numinfo, ORIGINAL_SAMPLE_COUNT + _cur_grffile->num_sounds);
 		return CIR_INVALID_ID;
 	}