hdf5_msb

[svn-r21865] Purpose:
  Fix for HDFFV-7838 h5ls: segfault for handling region reference in attribute with -v option

Description:
  Segfault occurred when h5ls access region reference data in an attribute. 
  This didn't occurred when -v option was used. 
  The cause was "h5tool_format_t info;" struct variable members were accessed
  without proper values were assigned (was NULL), so printf failed later in the code.
  
Tested:
 jam (linux32-LE), koala (linux64-LE), heiwa (linuxppc64-BE), tejeda (mac32-LE), linew (solaris-BE),  cmake-Windows (32-LE)