[gdaltools] add missed signals (fix #15623)

Author: alexbruy

python/plugins/GdalTools/tools/doExtractProj.py

@@ -23,7 +23,7 @@
 # This will get replaced with a git SHA1 when you do a git archive
 __revision__ = '$Format:%H$'
 
-from qgis.PyQt.QtCore import Qt, QCoreApplication, QThread, QMutex
+from qgis.PyQt.QtCore import Qt, QCoreApplication, QThread, QMutex, pyqtSignal
 from qgis.PyQt.QtWidgets import QDialog, QDialogButtonBox, QApplication, QMessageBox
 from qgis.PyQt.QtGui import QCursor
 
@@ -184,6 +184,10 @@ def extractProjection(filename, createPrj):
 
 class ExtractThread(QThread):
 
+    fileProcessed = pyqtSignal()
+    processFinished = pyqtSignal()
+    processInterrupted = pyqtSignal()
+
     def __init__(self, files, needPrj):
         QThread.__init__(self, QThread.currentThread())
         self.inFiles = files