java/interp: Fix compilation on Darwin
java/interp: Fix compilation on Darwin

The Clang version on Darwin is more picky on stack allocation and gotos.

Signed-off-by: Pekka Enberg <add4fcd06328a394f0ad91feda7ee057316dc5ed@iki.fi>

penberg/hornet,penberg/hornet,penberg/hornet,penberg/hornet