[svn-r29340] Purpose: Code cleanup

Description:
    - Removed many warnings:
        warning: use of old-style cast
        warning: enumeration value ‘H5D_VIRTUAL’ not handled in switch
        warning: comparison between signed and unsigned
      There are others of the same warnings and they will be taken care of
      in the next release.
    - Made some code reuse between overloads
Platforms tested:
    Linux/32 2.6 (jam)
    Linux/64 (platypus)
    Darwin (osx1010test)

c++/src/H5PropList.cpp

@@ -592,7 +592,7 @@ void PropList::setProperty(const char* name, void* value) const
 //--------------------------------------------------------------------------
 void PropList::setProperty(const char* name, const char* charptr) const
 {
-   herr_t ret_value = H5Pset(id, name, (void*) charptr);
+   herr_t ret_value = H5Pset(id, name, (void*)charptr);
    if (ret_value < 0)
    {
       throw PropListIException(inMemFunc("setProperty"), "H5Pset failed");