Minor code cleanup and changes

src/bus.cpp

@@ -13,8 +13,7 @@ uint8_t Bus::Read(uint32_t address) {
         return wram[address - 0x7E0000];
     } else if (address >= 0x800000 && cartridge) {
         // ROM access
-        uint32_t rom_addr = address & 0x7FFFFF;
-        if (rom_addr < cartridge->size()) {
+        if (const uint32_t rom_addr = address & 0x7FFFFF; rom_addr < cartridge->size()) {
             return (*cartridge)[rom_addr];
         }
     }

src/main.cpp

@@ -12,7 +12,7 @@ class PPU;
 class APU;
 class Bus;
 
-int main(int argc, char* argv[]) {
+int main(const int argc, char* argv[]) {
     if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0) {
         std::cout << "SDL could not initialize! SDL_Error: " << SDL_GetError() << std::endl;
         return -1;
@@ -22,7 +22,7 @@ int main(int argc, char* argv[]) {
         "BreadedSNES",
         SDL_WINDOWPOS_UNDEFINED,
         SDL_WINDOWPOS_UNDEFINED,
-        256, 224,  // SNES output resolution
+        256, 224,  // SNES output res
         SDL_WINDOW_SHOWN
     );
 

src/system.cpp

@@ -29,7 +29,7 @@ bool System::LoadROM(const std::string& filename) {
     }
 
     file.seekg(0, std::ios::end);
-    size_t size = file.tellg();
+    const size_t size = file.tellg();
     file.seekg(0, std::ios::beg);
 
     cartridge_data.resize(size);