fix #71 - missing translation

Author: stoecker

src/main/java/org/openstreetmap/josm/plugins/pt_assistant/validation/SegmentChecker.java

@@ -660,7 +660,7 @@ protected static void modifyStopByStopErrorMessages() {
             } else if (numberOfFixes == 1) {
                 builder.message(tr("PT: Problem in the route segment with one automatic fix"));
             } else {
-                builder.message("PT: Problem in the route segment with several automatic fixes");
+                builder.message(tr("PT: Problem in the route segment with several automatic fixes"));
             }
 
         }