Fix use of uninitialized value for some instructions
Fix use of uninitialized value for some instructions

Caught by Valgrind:

    Conditional jump or move depends on uninitialised value(s)
       at 0xD5BB6F: readModRM (X86DisassemblerDecoder.c:1528)
       by 0xD5BF02: getIDWithAttrMask (X86DisassemblerDecoder.c:1101)
       by 0xD5CC5E: getID (X86DisassemblerDecoder.c:1249)
       by 0xD5CC5E: decodeInstruction (X86DisassemblerDecoder.c:2335)
       by 0xD52009: X86_getInstruction (X86Disassembler.c:822)
       by 0xD51781: cs_disasm (cs.c:503)

bSr43/capstone,bSr43/capstone,pranith/capstone,pranith/capstone,pranith/capstone,AmesianX/capstone,bSr43/capstone,pranith/capstone,AmesianX/capstone,pranith/capstone,AmesianX/capstone,bSr43/capstone,pranith/capstone,bSr43/capstone,AmesianX/capstone,pranith/capstone,AmesianX/capstone,AmesianX/capstone,AmesianX/capstone,bSr43/capstone,bSr43/capstone