Use sys.exit(...) instead of exit(...): exit(...) should not be used in programs

share/qt/extract_strings_qt.py

@@ -58,7 +58,7 @@ XGETTEXT=os.getenv('XGETTEXT', 'xgettext')
 if not XGETTEXT:
     print('Cannot extract strings: xgettext utility is not installed or not configured.',file=sys.stderr)
     print('Please install package "gettext" and re-run \'./configure\'.',file=sys.stderr)
-    exit(1)
+    sys.exit(1)
 child = Popen([XGETTEXT,'--output=-','-n','--keyword=_'] + files, stdout=PIPE)
 (out, err) = child.communicate()