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imDefLkup: verify that a pointer isn't NULL before using it

Ghost User requested to merge (removed):nullcheck into master

It is possible for _XimICOfXICID() to return NULL, so it is necessary to check this isn't actually the case before dereferencing the pointer. All other callers of _XimICOfXICID() do this check too.

(The check itself is ugly, but it follows the style of the code in the rest of the module.)

Fixes issue #45 (closed).

Reported-by: Bhavi Dhingra

Original-patch-by: Bhavi Dhingra

Signed-off-by: Benno Schulenberg

Edited by Ghost User

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