fix(knowing framework/yolov2 region layer): free region layer thresholds

APP_Framework/Applications/knowing_app/iris_ml_demo/iris_ml_demo.c

@@ -19,7 +19,8 @@ void simple_CSV_read()
     fin = open(CSV_PATH, O_RDONLY);
     if (!fin) {
         printf("Error open file %s", CSV_PATH);
-        exit(-1);
+        // exit(-1);
+        return;
     }
     read(fin, buffer, sizeof(buffer));
     close(fin);

APP_Framework/Applications/knowing_app/k210_detect_entry/helmet.json

@@ -27,7 +27,7 @@
 	"kmodel_size": 2714044,
 	"obj_thresh": [
 		0.7,
-		0.9
+		0.99
 	],
 	"labels": [
 		"head",

APP_Framework/Applications/knowing_app/k210_detect_entry/k210_detect_entry.c

@@ -7,11 +7,10 @@ static void detect_app(int argc, char *argv[])
 {
     if (2 != argc) {
         printf("Usage: detect_app <ABSOLUTE_CONFIG_JSON_PATH>");
-        exit(-1);
+    } else {
+        k210_detect(argv[1]);
     }
 
-    k210_detect(argv[1]);
-
     return;
 }
 // clang-format off