[Lightning] jit_pusharg_p: small bug

[Ludovic Courtès]

Hello,

In <lightning/core-common.h>, `jit_pusharg_p' is defined as follows:

  #define jit_pusharg_p(rs)             jit_pusharg_ul(rs)

On IA32, `jit_pusharg_ul', once expanded, performs bitwise binary
operations (namely an `&') on its operand.  Consequently, its operand
must be an integer and _not_ a pointer.  If a pointer is passed, GCC
will fail with "error: invalid operands to binary &" (unlike on the
PPC).

Therefore I suggest rewriting the above macro as:

  #define jit_pusharg_p(rs)             jit_pusharg_ul((unsigned long)rs)

Thanks,
Ludovic.