Fixed the issues with some OpenCL implementation to avoid errors casting changing the pointer address spaces

lib/gpu/lal_atom.cpp

@@ -49,7 +49,7 @@ int AtomT::bytes_per_atom() const {
   if (_vel)
     bytes+=4*sizeof(numtyp);
   if (_extra_fields>0)
-    bytes+=_extra_fields*sizeof(numtyp);
+    bytes+=_extra_fields*sizeof(numtyp4);
   return bytes;
 }