Fix errors while making image quality checks (#2444)

Author: maskaravivek

app/src/main/java/fr/free/nrw/commons/upload/ImageProcessingService.java

@@ -117,6 +117,7 @@ private Single<Integer> checkDarkImage(String filePath) {
 
     /**
      * Checks for image geolocation
+     * returns IMAGE_OK if the place is null or if the file doesn't contain a geolocation
      * @param filePath file to be checked
      * @return IMAGE_GEOLOCATION_DIFFERENT or IMAGE_OK
      */
@@ -127,6 +128,11 @@ private Single<Integer> checkImageGeoLocation(Place place, String filePath) {
         }
         return Single.fromCallable(() -> filePath)
                 .map(fileUtilsWrapper::getGeolocationOfFile)
-                .flatMap(geoLocation -> imageUtilsWrapper.checkImageGeolocationIsDifferent(geoLocation, place.getLocation()));
+                .flatMap(geoLocation -> {
+                    if (StringUtils.isNullOrWhiteSpace(geoLocation)) {
+                        return Single.just(ImageUtils.IMAGE_OK);
+                    }
+                    return imageUtilsWrapper.checkImageGeolocationIsDifferent(geoLocation, place.getLocation());
+                });
     }
 }