Fix crash in x86 disassembler.

Probably a typo from last refactoring.

Change-Id: I086a87120ca0f0dfddbe803573b0e0f79cc6d945
diff --git a/disassembler/disassembler_x86.cc b/disassembler/disassembler_x86.cc
index b58f5fa..1a768c8 100644
--- a/disassembler/disassembler_x86.cc
+++ b/disassembler/disassembler_x86.cc
@@ -171,7 +171,7 @@
   std::ostringstream address;
   if (mod == 0 && rm == 5) {
     if (!supports_rex_) {  // Absolute address.
-      *address_bits = *reinterpret_cast<const uint32_t*>(**instr);
+      *address_bits = *reinterpret_cast<const uint32_t*>(*instr);
       address << StringPrintf("[0x%x]", *address_bits);
     } else {  // 64-bit RIP relative addressing.
       address << StringPrintf("[RIP + 0x%x]",  *reinterpret_cast<const uint32_t*>(*instr));