Fix GH-13833: Applying zero offset to null pointer in zend_hash.c

MAPPHAR_FAIL will call the destructor of the manifest, mounted_dirs, and
virtual_dirs tables. When a new phar object is

Fix GH-13833: Applying zero offset to null pointer in zend_hash.c

MAPPHAR_FAIL will call the destructor of the manifest, mounted_dirs, and
virtual_dirs tables. When a new phar object is allocated using (p)ecalloc,
the bytes are zeroed, but the flag for an uninitialized table is
non-zero. So we have to manually set the flag in case that we have a
code path that can destroy the tables without first initializing them at
least once.

Closes GH-13847.

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