From 463652c99c791f56e437d24f13425e79011806a1 Mon Sep 17 00:00:00 2001
From: Tom Kazimiers <tom@voodoo-arts.net>
Date: Tue, 21 Nov 2023 16:30:05 +0100
Subject: [PATCH] =?UTF-8?q?Gutschriften:=20fix=20f=C3=BCr=20negative=20MwS?=
 =?UTF-8?q?t.?=
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Das Runden hat für negative Zahlen nicht funktioniert.

Fixes rechnung#14
---
 rechnung.dtx | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/rechnung.dtx b/rechnung.dtx
index 0085926..4f16bd1 100644
--- a/rechnung.dtx
+++ b/rechnung.dtx
@@ -1013,9 +1013,17 @@
 % \[\left\lfloor\frac{\hbox{\LangNet}\cdot\hbox{\LangTaxRate}+50}{100}\right\rfloor\]
 %    \begin{macrocode}
   \multiply\@RCHmwsti\@RCHstsi
-  \advance\@RCHmwsti50\divide\@RCHmwsti100
+  \ifnum\@RCHmwsti<0
+    \advance\@RCHmwsti-50\divide\@RCHmwsti100
+  \else
+    \advance\@RCHmwsti50\divide\@RCHmwsti100
+  \fi
   \multiply\@RCHmwstii\@RCHstsii
-  \advance\@RCHmwstii50\divide\@RCHmwstii100
+  \ifnum\@RCHmwstii<0
+    \advance\@RCHmwstii-50\divide\@RCHmwstii100
+  \else
+    \advance\@RCHmwstii50\divide\@RCHmwstii100
+  \fi
   \@RCHmwst\@RCHmwsti\advance\@RCHmwst\@RCHmwstii
   \if@RCHerm
     \@RCHsline{zzgl. \@RCHstsii\,\% MwSt.}{\writeCurrency\@RCHmwstii}%