Fix name=null

Author: ppwwyyxx

nsys2json.py

@@ -315,7 +315,7 @@ def parse_all_events(conn: sqlite3.Connection, strings: dict, activities=None, e
     if ActivityType.NVTX_KERNEL in activities:
         for nvtx_event, (kernel_start_time, kernel_end_time) in nvtx_kernel_event_map.items():
             event = {
-                "name": nvtx_event["text"],
+                "name": nvtx_event["text"] or "",
                 "ph": "X", # Complete Event (Begin + End event)
                 "cat": "nvtx-kernel",
                 "ts": munge_time(kernel_start_time),
@@ -346,4 +346,4 @@ def nsys2json():
         json.dump(traceEvents, f)
 
 if __name__ == "__main__":
-    nsys2json()
+    nsys2json()