[svn-r12200] Purpose: Maintenance

Description:
    Changed to alias string instead of std, i.e. H5std_string instead
    of H5std, because the old way wasn't working when std didn't exist.

Platforms tested:
    Linux 2.4 (heping)
    SunOS 5.8 64-bit (sol)
    HPUX 11.00 (kelgia) - this was the problematic platform but I wasn't
                                able to test before.

c++/src/H5DcreatProp.h

@@ -101,7 +101,7 @@ class H5_DLLCPP DSetCreatPropList : public PropList {
 	void setShuffle();
 
 	// Returns this class name
-	virtual H5_std::string fromClass () const { return("DSetCreatPropList"); }
+	virtual H5std_string fromClass () const { return("DSetCreatPropList"); }
 
 	// Default constructor: creates a stub dataset creation property list.
 	DSetCreatPropList();