From 345c982b3b9de7a9bbd9c352ed1d6108da181382 Mon Sep 17 00:00:00 2001
From: whitequark <whitequark@whitequark.org>
Date: Fri, 21 Oct 2016 20:08:09 +0400
Subject: [PATCH] OS X: don't crash in GetSaveFile() if default extension is
 invalid.

---
 src/platform/cocoamain.mm | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/platform/cocoamain.mm b/src/platform/cocoamain.mm
index d9c12654..9838058a 100644
--- a/src/platform/cocoamain.mm
+++ b/src/platform/cocoamain.mm
@@ -792,6 +792,9 @@ bool SolveSpace::GetSaveFile(std::string *file, const std::string &defExtension,
     if(defExtension != "") {
         extensionIndex = [extensions indexOfObject:
             [NSString stringWithUTF8String:defExtension.c_str()]];
+        if(extensionIndex == -1) {
+            extensionIndex = 0;
+        }
     }
 
     [button selectItemAtIndex:extensionIndex];