Do not append empty ":" in LD_LIBRARY_PATH.

diff --git a/programs/winelauncher.in b/programs/winelauncher.in
index 55f6c0e..dd26af5 100755
--- a/programs/winelauncher.in
+++ b/programs/winelauncher.in
@@ -195,7 +195,11 @@
 #------------------------------------------------------------------------------
 #  Okay, set the paths and move on.
 #------------------------------------------------------------------------------
-export LD_LIBRARY_PATH=$WINELIB:$LD_LIBRARY_PATH
+if [ -n "$LD_LIBRARY_PATH" ]; then
+	export LD_LIBRARY_PATH=$WINELIB:$LD_LIBRARY_PATH
+else
+	export LD_LIBRARY_PATH=$WINELIB
+fi
 export PATH=$WINEBIN:$PATH
 export WINELOADER=$WINEBIN/$WINE_BIN_NAME
 export WINEDLLPATH