size() == 0 to isEmpty() and comment clarification as per Marc's request.
size() == 0 to isEmpty() and comment clarification as per Marc's request.

svn path=/trunk/kdepim/; revision=275018

lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi