Soft-proofing: fall back to using the current output profile if no printer profile is specified

Implements #4361

rtengine/iccstore.cc

@@ -333,6 +333,10 @@ public:
         }
 
         defaultMonitorProfile = settings->monitorProfile;
+
+        // initialize the alarm colours for lcms gamut checking -- we use bright green
+        cmsUInt16Number cms_alarm_codes[cmsMAXCHANNELS] = { 0, 65535, 0 };
+        cmsSetAlarmCodes(cms_alarm_codes);
     }
 
     cmsHPROFILE workingSpace(const Glib::ustring& name) const