From 21d37a92e5c309fb7a5041fccdc6aee896e3eb8e Mon Sep 17 00:00:00 2001
From: Michael Kirk <michael.code@endoftheworl.de>
Date: Fri, 4 Nov 2016 17:39:28 -0400
Subject: [PATCH] Fix crash on nil image.

The only case I've actuall seen this is when a download is removed from
the file system, outside of Signal.

// FREEBIE
---
 Signal/src/util/NumberUtil.m | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/Signal/src/util/NumberUtil.m b/Signal/src/util/NumberUtil.m
index f3447b325..1ac164a94 100644
--- a/Signal/src/util/NumberUtil.m
+++ b/Signal/src/util/NumberUtil.m
@@ -46,10 +46,18 @@
 
 + (double)clamp:(double)value toMin:(double)min andMax:(double)max {
     ows_require(min <= max);
-    if (value < min)
+    if (isnan(value)) {
+        return max;
+    }
+
+    if (value < min) {
         return min;
-    if (value > max)
+    }
+
+    if (value > max) {
         return max;
+    }
+
     return value;
 }