message: add log message when inputfile not found.
diff: @@ -309,6 +309,9 @@ export class Manager {
  inputFilePath = utils.resolveFile([path.dirname(filePath), rootDir, ...texDirs], result[2])
  }
  + if (inputFilePath && !fs.existsSync(inputFilePath)) {
  + this.extension.logger.addLogMessage(`Cannot find ${inputFilePath}`)
  + }
  // Test if we are facing circular inclusion
  if (inputFilePath && fs.existsSync(inputFilePath) && inputFilePath !== filePath && !this.texFileTree[filePath].has(inputFilePath)) {
  this.texFileTree[filePath].add(inputFilePath)
  