core: fix many conversion issues

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
emoticons: fix many conversion issues

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
exec_notify: fix many conversion issues

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
gadu: fix many conversion issues

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
hints: fix many conversion issues

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
history: fix many conversion issues

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
idle: fix many conversion issues

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
jabber: fix many conversion issues

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
otr: fix many conversion issues

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
pcspeaker: fix many conversion issues

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
screenshot: fix many conversion issues

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
tabs: fix many conversion issues

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>