A split memorized transaction with blank category breaks parsing

[rtaft]

I have some old memorized transactions that are not active, but still appear in the export. One of the accounts that was originally attached to one of the split lines was deleted, and after several quicken upgrades, now just appears as a blank category. During the parsing of the QIF file, an exception is raised due to the missing S entry.
Sample:

KP
U-625.32
T-625.32
PDOVENMUEHLE
$-136.93
SInterest Exp
$-304.84
S[Escrow]
$-183.55
^