From caf7e1b2bd792114a04b9664bc10a1d8c918f0c2 Mon Sep 17 00:00:00 2001
From: Ingo <heckflosse@i-weyrich.de>
Date: Sat, 23 May 2015 13:43:58 +0200
Subject: [PATCH] Fixed an endless loop when using camconst entry without white
 level, no Issue

---
 rtengine/rawimage.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rtengine/rawimage.cc b/rtengine/rawimage.cc
index f206a25d2..6931f32b6 100755
--- a/rtengine/rawimage.cc
+++ b/rtengine/rawimage.cc
@@ -455,7 +455,7 @@ int RawImage::loadRaw (bool loadData, bool closeFile, ProgressListener *plistene
                 // load 4 channel white level here, will be used if available
                 if (RT_whitelevel_from_constant) {
                     maximum_c4[i] = cc->get_WhiteLevel(i, iso_speed, aperture);
-                    if(tiff_bps > 0 && !isFoveon()) {
+                    if(tiff_bps > 0 && maximum_c4[i] > 0 && !isFoveon()) {
                         unsigned compare = ((uint64_t)1 << tiff_bps) - 1; // use uint64_t to avoid overflow if tiff_bps == 32
                         while(maximum_c4[i] > compare)
                             maximum_c4[i] >>= 1;