Rename locale extensions from .txt to .ini

Because we're using .ini format, the translation servies spit out files
with .ini extensions, so this makes it so we don't necessarily have to
rename those files from .ini to .txt before merging.

obs/obs-app.cpp

@@ -166,11 +166,11 @@ bool OBSApp::InitLocale()
 	locale = lang;
 
 	stringstream file;
-	file << "locale/" << lang << ".txt";
+	file << "locale/" << lang << ".ini";
 
 	string englishPath;
-	if (!GetDataFilePath("locale/" DEFAULT_LANG ".txt", englishPath)) {
-		OBSErrorBox(NULL, "Failed to find locale/" DEFAULT_LANG ".txt");
+	if (!GetDataFilePath("locale/" DEFAULT_LANG ".ini", englishPath)) {
+		OBSErrorBox(NULL, "Failed to find locale/" DEFAULT_LANG ".ini");
 		return false;
 	}