From 4fad67d72115e68a7b30bc11b66c2eb470f506ab 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/cocoa/cocoamain.mm | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/cocoa/cocoamain.mm b/src/cocoa/cocoamain.mm
index b47c5c9..1b6d3e6 100644
--- a/src/cocoa/cocoamain.mm
+++ b/src/cocoa/cocoamain.mm
@@ -810,6 +810,9 @@ 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];