fix for pdi with ahi 2

[dzruyk]

r_core_disasm_pdi calls r_parse_filter after r_print_colorize_opcode,
this produces incorrect output when we use pdi with ahi 2.

before pull:

	$ r2 malloc://16
	[0x00000000]> e asm.arch=x86
	[0x00000000]> e asm.bits=64
	[0x00000000]> wx 48b96e74646c6c2e646c
	[0x00000000]> ahi 2
	[0x00000000]> pi 1
	movabs rcx, 'ld.lldtn'
	[0x00000000]> pdi 1
	0x00000000 48b96e74646c6c2e646c  movabs rcx, 0x6c642e6c6c64746e

after pull:

	$ r2 malloc://16
	[0x00000000]> e asm.arch=x86
	[0x00000000]> e asm.bits=64
	[0x00000000]> wx 48b96e74646c6c2e646c
	[0x00000000]> ahi 2
	[0x00000000]> pi 1
	movabs rcx, 'ld.lldtn'
	[0x00000000]> pdi 1
	0x00000000 48b96e74646c6c2e646c  movabs rcx, 'ld.lldtn'

Second commit in pull with some refactoring for simplifying r_core_disasm_pdi.

[radare]

if master is green it means that we lack some tests to cover this case

[radare]

can u send some tests pls?

[dzruyk]

Yes, no problem. I do it soon