fix x86_64 shellcode

macho-go/pkg/ios/macho/edit.go

@@ -471,9 +471,9 @@ func (mc *MachoContext) ReworkForObjc() {
 	ins_size_byte := 4
 	main_offset := int(mc.entryoff)
 	var shellcode_offset int
-	
+
 	if mc.header.cputype == 12{
-		shellcode := []uint32{
+		shellcode = []uint32{
 			0x10000008,
 			0, // x9 = (offset end of __DATA) - (offset shellcode)
 			0x8B090108,
@@ -514,7 +514,7 @@ func (mc *MachoContext) ReworkForObjc() {
 		fmt.Printf("// lc_main_offset=%x\n", lc_main_offset)
 	} else {
 		// TODO: fix to work with offset larger than 0xffff
-		shellcode := []uint32{
+		shellcode = []uint32{
 			0x00058d4c,
 			0x66000000,
 			0, 				// offset