From b0163f3937ff1e439516f66cf1adf20757635a2f Mon Sep 17 00:00:00 2001
From: David Capello <david@igarastudio.com>
Date: Fri, 17 May 2019 18:11:14 -0300
Subject: [PATCH] Don't crash with div by zero when grid bounds has an invalid
 value

---
 src/app/snap_to_grid.cpp            | 4 ++++
 src/app/ui/editor/standby_state.cpp | 9 +++++----
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/app/snap_to_grid.cpp b/src/app/snap_to_grid.cpp
index f43f04133..106ad8461 100644
--- a/src/app/snap_to_grid.cpp
+++ b/src/app/snap_to_grid.cpp
@@ -1,4 +1,5 @@
 // Aseprite
+// Copyright (C) 2019  Igara Studio S.A.
 // Copyright (C) 2001-2016  David Capello
 //
 // This program is distributed under the terms of
@@ -21,6 +22,9 @@ gfx::Point snap_to_grid(const gfx::Rect& grid,
                         const gfx::Point& point,
                         const PreferSnapTo prefer)
 {
+  if (grid.isEmpty())
+    return point;
+
   gfx::Point newPoint;
   div_t d, dx, dy;
 
diff --git a/src/app/ui/editor/standby_state.cpp b/src/app/ui/editor/standby_state.cpp
index 5ed9416b7..86be71fc0 100644
--- a/src/app/ui/editor/standby_state.cpp
+++ b/src/app/ui/editor/standby_state.cpp
@@ -597,10 +597,11 @@ bool StandbyState::onUpdateStatusBar(Editor* editor)
 
     if (editor->docPref().show.grid()) {
       auto gb = editor->docPref().grid.bounds();
-      int col = int((std::floor(spritePos.x) - (gb.x % gb.w)) / gb.w);
-      int row = int((std::floor(spritePos.y) - (gb.y % gb.h)) / gb.h);
-      sprintf(
-        buf+std::strlen(buf), " :grid: %d %d", col, row);
+      if (!gb.isEmpty()) {
+        int col = int((std::floor(spritePos.x) - (gb.x % gb.w)) / gb.w);
+        int row = int((std::floor(spritePos.y) - (gb.y % gb.h)) / gb.h);
+        sprintf(buf+std::strlen(buf), " :grid: %d %d", col, row);
+      }
     }
 
     if (editor->docPref().show.slices()) {