From 6b8c7f23e721202bfc33cfef4ccaeaa2a52ba922 Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Fri, 24 Aug 2018 21:50:17 +0200
Subject: [PATCH] pressing Backspace while the Archimedean symbol is already
 deleted does nothing instead of leaving the menu

---
 archimedean.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/archimedean.cpp b/archimedean.cpp
index 6cb2ef70..74d58bc3 100644
--- a/archimedean.cpp
+++ b/archimedean.cpp
@@ -1098,7 +1098,8 @@ void show() {
     if(sym == SDLK_LEFT) editpos--;
     if(sym == SDLK_RIGHT) editpos++;
     dialog::handleNavigation(sym, uni);
-    if(symbol_editing && uni == 8 && editpos > 0) {
+    if(symbol_editing && uni == 8) {
+      if(editpos == 0) return;
       edited.symbol.replace(editpos-1, 1, "");
       editpos--;
       edited.parse(edited.symbol);