Fixes another two bugs detected by cppcheck, no Issue

rtengine/rawimage.cc

@@ -499,7 +499,7 @@ DCraw::dcraw_coeff_overrides(const char make[], const char model[], const int is
 
     *black_level = -1;
     *white_level = -1;
-    memset(trans, 0, sizeof(trans));
+    memset(trans, 0, sizeof(*trans)*12);
 
     // indicate that DCRAW wants these from constants (rather than having loaded these from RAW file
     // note: this is simplified so far, in some cases dcraw calls this when it has say the black level

rtgui/bqentryupdater.cc

@@ -151,7 +151,7 @@ void BatchQueueEntryUpdater::terminate  () {
 
     if (!stopped) {
         // Yield to currently running thread and wait till it's finished
-        GThreadUnLock();
+        GThreadUnLock lock;
         tostop = true;
         Glib::Thread::self()->yield(); 
         if (!stopped) thread->join ();