From f44962c01a0e5f5fdf9652cb28e775838fe0dbbc Mon Sep 17 00:00:00 2001
From: Espyo <andreluis.g.silva@gmail.com>
Date: Wed, 20 May 2020 16:48:21 +0100
Subject: [PATCH] Backends: Allegro: Don't call AddInputCharacter if the
 pressed key has no character. (#3252)

---
 examples/imgui_impl_allegro5.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/examples/imgui_impl_allegro5.cpp b/examples/imgui_impl_allegro5.cpp
index 76f74a3fa..2c7df9a92 100644
--- a/examples/imgui_impl_allegro5.cpp
+++ b/examples/imgui_impl_allegro5.cpp
@@ -357,7 +357,8 @@ bool ImGui_ImplAllegro5_ProcessEvent(ALLEGRO_EVENT *ev)
         return true;
     case ALLEGRO_EVENT_KEY_CHAR:
         if (ev->keyboard.display == g_Display)
-            io.AddInputCharacter((unsigned int)ev->keyboard.unichar);
+            if (ev->keyboard.unichar != 0)
+                io.AddInputCharacter((unsigned int)ev->keyboard.unichar);
         return true;
     case ALLEGRO_EVENT_KEY_DOWN:
     case ALLEGRO_EVENT_KEY_UP: