i386-asm.s: Do bit-check for OP_SEG in asm_opcode

Fix a bug with "call *%%gs:16", which sets the two flags OP_INDIR and
OP_SEG in pop->type.

Author: Stefan

i386-asm.c

@@ -722,7 +722,7 @@ ST_FUNC void asm_opcode(TCCState *s1, int opcode)
         }
         parse_operand(s1, pop);
         if (tok == ':') {
-           if (pop->type != OP_SEG || seg_prefix)
+           if (!(pop->type & OP_SEG) || seg_prefix)
                tcc_error("incorrect prefix");
            seg_prefix = segment_prefixes[pop->reg];
            next();
@@ -852,7 +852,7 @@ ST_FUNC void asm_opcode(TCCState *s1, int opcode)
         if (opcode >= TOK_ASM_first && opcode <= TOK_ASM_last) {
             int b;
             b = op0_codes[opcode - TOK_ASM_first];
-            if (b & 0xff00) 
+            if (b & 0xff00)
                 g(b >> 8);
             g(b);
             return;