Fix a couple of NSEDoc errors.

nselib/msrpc.lua

@@ -1215,8 +1215,6 @@ end
 --@param domain_handle  The domain_handle, returned by <code>samr_opendomain</code>
 --@param level          The level, which determines which type of information to query for. See the @return section
 --                      for details. 
---@param result       [optional] A 'result' to add the entries to. This lets us call this function multiple times, 
---                      for multiple levels, and keep the results in one place. 
 --@return (status, result) If status is false, result is an error message. Otherwise, result is a table of values, 
 --        and the values that are returned are dependent on the 'level' settings:
 --        Level 1:

nselib/msrpctypes.lua

@@ -2506,7 +2506,7 @@ end
 ---Marshall a winreg_StringBuffer pointer. Same as <code>marshall_winreg_StringBuf</code>, except
 -- the string can be <code>nil</code>. 
 --
---@param table The string to marshall. Can be <code>nil</code>.
+--@param table The table representing the String.
 --@param max_length [optional] The maximum size of the buffer, in characters. Defaults to the length of the string, including the null. 
 --@return A string representing the marshalled data. 
 function marshall_winreg_StringBuf_ptr(table, max_length)