Handle return value NULL of GeoCrumbs::getParserCache

GeoCrumbs::getParserCache can return NULL, so check this before try
to access the expected returned object.

Bug: 70827
Change-Id: Ide1b8a7cfeb7f67c419c766e4edded2e842a94dc
(cherry picked from commit 08c4737e11153f1767b382f8fffeba6034f0f2d5)