Backpport: Fix searching when the header field in question is the first one of a message.
Backpport: Fix searching when the header field in question is
the first one of a message.

svn path=/branches/KDE_3_3_BRANCH/kdepim/; revision=353207

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