Fix nasa#261, Clarify table never loaded error

Documentation/comment change only.
Moved get address specific information from error code to API.

fsw/cfe-core/src/inc/cfe_error.h

@@ -1036,12 +1036,7 @@
 /**
  * @brief Never Loaded
  *
- *  This is an error indicating that the table has never been loaded from
- *  either a file or a copy from a block of memory so the contents that the
- *  returned pointer is pointing to are zeros.
- *  <B> NOTE: Unlike other most other errors, this error condition still
- *  returns a valid table pointer.  This pointer must be released with the
- *  #CFE_TBL_ReleaseAddress API before the table can be loaded with data. </B>
+ *  Table has not been loaded with data.
  *
  */
 #define CFE_TBL_ERR_NEVER_LOADED ((int32)0xcc000005)

fsw/cfe-core/src/inc/cfe_tbl.h

@@ -601,6 +601,11 @@ int32   CFE_TBL_Modified( CFE_TBL_Handle_t TblHandle );
 **           either a #CFE_TBL_Update call or any blocking call (e.g. - pending on software 
 **           bus message, etc).  Table updates cannot occur while table addresses have not 
 **           been released.
+**        -# #CFE_TBL_ERR_NEVER_LOADED will be returned if the table has never been
+**           loaded (either from file or from a block of memory), but the function
+**           will still return a valid table pointer to a table with all zero content.
+**           This pointer mush be released with the #CFE_TBL_ReleaseAddress API before
+**           the table can be loaded with data.
 **
 ** \param[in]  TblPtr     The address of a pointer that will be loaded with the address of 
 **                        the first byte of the table.  This pointer can then be typecast 
@@ -681,6 +686,11 @@ int32 CFE_TBL_ReleaseAddress( CFE_TBL_Handle_t TblHandle );
 **           either a #CFE_TBL_Update call or any blocking call (e.g. - pending on software 
 **           bus message, etc).  Table updates cannot occur while table addresses have not 
 **           been released.
+**        -# #CFE_TBL_ERR_NEVER_LOADED will be returned if the table has never been
+**           loaded (either from file or from a block of memory), but the function
+**           will still return a valid table pointer to a table with all zero content.
+**           This pointer mush be released with the #CFE_TBL_ReleaseAddress API before
+**           the table can be loaded with data.
 **
 ** \param[in] TblPtrs    Array of Pointers to variables that calling Application
 **                       wishes to hold the start addresses of the Tables.