Make ResourcePack bitness-agnostic

pge/src/olcPGE_ResourcePack.cpp

 		if (!ofs.is_open()) return olc::FAIL;
 
 		// 1) Write Map
-		size_t nMapSize = mapFiles.size();
-		ofs.write((char*)&nMapSize, sizeof(size_t));
+		uint32_t nMapSize = mapFiles.size();
+		ofs.write((char*)&nMapSize, sizeof(uint32_t));
 		for (auto &e : mapFiles)
 		{
-			size_t nPathSize = e.first.size();
-			ofs.write((char*)&nPathSize, sizeof(size_t));
+			uint32_t nPathSize = e.first.size();
+			ofs.write((char*)&nPathSize, sizeof(uint32_t));
 			ofs.write(e.first.c_str(), nPathSize);
 			ofs.write((char*)&e.second.nID, sizeof(uint32_t));
 			ofs.write((char*)&e.second.nFileSize, sizeof(uint32_t));
 
 		// 3) Rewrite Map (it has been updated with offsets now)
 		ofs.seekp(std::ios::beg);
-		ofs.write((char*)&nMapSize, sizeof(size_t));
+		ofs.write((char*)&nMapSize, sizeof(uint32_t));
 		for (auto &e : mapFiles)
 		{
-			size_t nPathSize = e.first.size();
-			ofs.write((char*)&nPathSize, sizeof(size_t));
+			uint32_t nPathSize = e.first.size();
+			ofs.write((char*)&nPathSize, sizeof(uint32_t));
 			ofs.write(e.first.c_str(), nPathSize);
 			ofs.write((char*)&e.second.nID, sizeof(uint32_t));
 			ofs.write((char*)&e.second.nFileSize, sizeof(uint32_t));
 		if (!ifs.is_open()) return olc::FAIL;
 
 		// 1) Read Map
-		size_t nMapEntries;
-		ifs.read((char*)&nMapEntries, sizeof(size_t));
-		for (size_t i = 0; i < nMapEntries; i++)
+		uint32_t nMapEntries;
+		ifs.read((char*)&nMapEntries, sizeof(uint32_t));
+		for (uint32_t i = 0; i < nMapEntries; i++)
 		{
-			size_t nFilePathSize = 0;
-			ifs.read((char*)&nFilePathSize, sizeof(size_t));
+			uint32_t nFilePathSize = 0;
+			ifs.read((char*)&nFilePathSize, sizeof(uint32_t));
 
 			std::string sFileName(nFilePathSize, ' ');
-			for (size_t j = 0; j < nFilePathSize; j++)
+			for (uint32_t j = 0; j < nFilePathSize; j++)
 				sFileName[j] = ifs.get();
 
 			sEntry e;