Refactoring (#95)

* Blake2Generator::getInt32 renamed to getUInt32 to avoid confusion
* isPowerOf2 renamed to isZeroOrPowerOf2 to avoid confusion
* added asserts to validate the input/output size of AES functions
* fixed possible overflow in JitCompilerX86::getCodeSize (unused function)

src/blake2_generator.cpp

@@ -46,7 +46,7 @@ namespace randomx {
 		return data[dataIndex++];
 	}
 
-	uint32_t Blake2Generator::getInt32() {
+	uint32_t Blake2Generator::getUInt32() {
 		checkData(4);
 		auto ret = load32(&data[dataIndex]);
 		dataIndex += 4;