Generate correct stubs for 0-argument syscalls
Generate correct stubs for 0-argument syscalls

Previously, the stub generator unintentionally generated a declaration
with *no* argument types, rather than "void", but in C this means "any
arguments of any types".  Fix this to generate correct declarations
with void arguments.

aclements/sv6,bowlofstew/sv6,aclements/sv6,bowlofstew/sv6,bowlofstew/sv6,aclements/sv6,aclements/sv6,aclements/sv6,bowlofstew/sv6,bowlofstew/sv6