Fix a crash in _dbg_addrinfoget

Thanks to @JustasMasiulis for reporting!

src/dbg/_exports.cpp

@@ -354,7 +354,8 @@ extern "C" DLL_EXPORT bool _dbg_addrinfoget(duint addr, SEGMENTREG segment, BRID
             Zydis cp;
             auto getregs = !bOnlyCipAutoComments || addr == lastContext.cip;
             disasmget(cp, addr, &instr, getregs);
-            if(!cp.IsNop())
+            // Some nop variants have 'operands' that should be ignored
+            if(cp.Success() && !cp.IsNop())
             {
                 //Ignore register values when not on CIP and OnlyCipAutoComments is enabled: https://github.com/x64dbg/x64dbg/issues/1383
                 if(!getregs)

src/zydis_wrapper/zydis_wrapper.cpp

@@ -399,7 +399,7 @@ bool Zydis::IsBranchType(std::underlying_type_t<BranchType> bt) const
 ZydisMnemonic Zydis::GetId() const
 {
     if(!Success())
-        DebugBreak();
+        return ZYDIS_MNEMONIC_INVALID;
     return mInstr.mnemonic;
 }