Added missing requirements

dlib/svm/structural_object_detection_trainer.h

@@ -262,13 +262,15 @@ namespace dlib
             {
                 for (unsigned long j = 0; j < truth_object_detections[i].size(); ++j)
                 {
-                    DLIB_ASSERT(truth_object_detections[i][j].movable_parts.size() == get_scanner().get_num_movable_components_per_detection_template(),
+                    DLIB_ASSERT(truth_object_detections[i][j].movable_parts.size() == get_scanner().get_num_movable_components_per_detection_template() &&
+                                all_parts_in_rect(truth_object_detections[i][j]) == true,
                         "\t trained_function_type structural_object_detection_trainer::train()"
                         << "\n\t invalid inputs were given to this function"
                         << "\n\t truth_object_detections["<<i<<"]["<<j<<"].movable_parts.size():                " << 
                             truth_object_detections[i][j].movable_parts.size()
                         << "\n\t get_scanner().get_num_movable_components_per_detection_template(): " << 
                             get_scanner().get_num_movable_components_per_detection_template()
+                        << "\n\t all_parts_in_rect(truth_object_detections["<<i<<"]["<<j<<"]): " << all_parts_in_rect(truth_object_detections[i][j])
                     );
                 }
             }

dlib/svm/structural_object_detection_trainer_abstract.h

@@ -296,6 +296,7 @@ namespace dlib
                   (also, image_array_type must be an implementation of dlib/array/array_kernel_abstract.h)
                 - for all valid i, j:
                     - truth_object_detections[i][j].movable_parts.size() == get_scanner().get_num_movable_components_per_detection_template() 
+                    - all_parts_in_rect(truth_object_detections[i][j]) == true
             ensures
                 - Uses the structural_svm_object_detection_problem to train an object_detector 
                   on the given images and truth_object_detections.  

dlib/svm/structural_svm_object_detection_problem.h

@@ -70,6 +70,7 @@ namespace dlib
                             truth_object_detections[i][j].movable_parts.size()
                         << "\n\t scanner.get_num_movable_components_per_detection_template(): " << 
                             scanner.get_num_movable_components_per_detection_template()
+                        << "\n\t all_parts_in_rect(truth_object_detections["<<i<<"]["<<j<<"]): " << all_parts_in_rect(truth_object_detections[i][j])
                     );
                 }
             }

dlib/svm/structural_svm_object_detection_problem_abstract.h

@@ -92,6 +92,7 @@ namespace dlib
                 - scanner.load(images[0]) must be a valid expression.
                 - for all valid i, j:
                     - truth_object_detections[i][j].movable_rects.size() == scanner.get_num_movable_components_per_detection_template() 
+                    - all_parts_in_rect(truth_object_detections[i][j]) == true
             ensures
                 - This object attempts to learn a mapping from the given images to the 
                   object locations given in truth_object_detections.  In particular, it attempts to