svx: fix up c10225762ce2c242d21126b5730b1d60f0150ed

Change-Id: Ib810a512f5a88af88901c53025cdf132f95b2ddc
AddressSanitizer: alloc-dealloc-mismatch (operator new vs free)

Change-Id: I500e70e64c478210bc6da0c13894995a0984c018