Use long integers in HDx_open to comply with new version of the HDF5 library...

Use long integers in HDx_open to comply with new version of the HDF5 library used in IDL 8.8 (issue #43)

lamp_mac/read_hdf.pro

@@ -13,9 +13,9 @@ if n_elements(vers) eq 0 then begin &  hdf5=0 & vers=4
 endif
 if hdf5 then begin &  b=CALL_FUNCTION('H5F_IS_HDF5',FileName) & if b then vers=5 else vers=4 & endif
 if vers eq 5 then begin
-         att_loc=-1L & file_id=H5F_OPEN( FileName)
-         grp_loc=-1L & grp_id =0L & grp_names='' & att_names='!'
-         sd_loc =-1L & sd_id  =0L & sd_names =''
+         att_loc=-1LL & file_id=H5F_OPEN( FileName)
+         grp_loc=-1LL & grp_id =0LL & grp_names='' & att_names='!'
+         sd_loc =-1LL & sd_id  =0LL & sd_names =''
          nb_ent =-1
          root=H5G_OPEN( file_id  , '/')     & Natts=H5A_GET_NUM_ATTRS(root)
          ok=0 & sk=0