replaced c-style array with c++ array

emulator/components/Register.cpp

@@ -11,9 +11,9 @@ Register& Register::getInstance() {
 }
 
 void Register::setRegister(const int reg, const int value) {
-    m_registers[reg] = value;
+    m_registers.at(reg) = value;
 }
 
 int Register::getRegister(const int reg) const {
-    return m_registers[reg];
+    return m_registers.at(reg);
 }