some fixes

src/qtapp/mdemList.cpp

@@ -273,7 +273,7 @@ void switchPage(int pageIdx);
 std::string getFilename(std::string path) {
 	static const std::regex lastPathElementExp = std::regex("(.+\\/)*(.+)"); 
 	std::smatch matches;
-	auto filenameMatched = std::regex_search(path, matches, lastPathElementExp); 
+	std::regex_search(path, matches, lastPathElementExp); 
 	return matches[2].str();
 }
 
@@ -385,7 +385,6 @@ Mdem* makeMdem() {
 	mdem->hFront.addWidget(&mdem->toggleVisibility);
 
 	// Back
-	QVBoxLayout *hBack = new QVBoxLayout();
 	mdem->wBack.setLayout(&mdem->hBack);
 	mdem->vMdem.addWidget(&mdem->wBack);
 
@@ -563,7 +562,6 @@ void reloadMdem(std::string path) {
 	MdemBuffer *buffer;
 	auto filename = getFilename(path);
 	if (currentMdem.compare(path) == 0) {
-		buffer = currentMdemBuffer;
 		currentMdem = path;
 		if (buffers.contains(path)) {
 			buffers.erase(path);