transferhandler.cpp expression equivalent to 'bool(A) != bool(B)'

Fix PVS-Studio issues "core/transferhandler.cpp:163: warning:
V728 An excessive check can be simplified. The '(A && !B) || (!A && B)' expression
is equivalent to the 'bool(A) != bool(B)' expression.
core/kget.cpp:1408: warning: V581 The conditional expressions of the
'if' statements situated alongside each other are identical.
Check lines: 1386, 1408.".