add -Wall tag to comple and fix wwarnings

source/buffer.cpp

@@ -89,13 +89,13 @@ size_t Buffer::find(uint8_t *data, size_t data_size)
 		if (memcmp(buffer + i, data, data_size) == 0)
 			return i;
 
-	return -1;
+	return SIZE_MAX;
 }
 
 void Buffer::remove(uint8_t *data, size_t data_size)
 {
 	size_t index = find(data, data_size);
-	if (index == -1)
+	if (index == SIZE_MAX)
 	{
 		printf("Error removing from buffer\n");
 		return;