Address Sanitizer found delete vs delete[] issue

mavlink_main.cpp used new char[n] and delete vs delete[].

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

src/modules/mavlink/mavlink_main.cpp

@@ -1232,7 +1232,7 @@ Mavlink::configure_stream_threadsafe(const char *stream_name, const float rate)
 			usleep(MAIN_LOOP_DELAY / 2);
 		} while (_subscribe_to_stream != nullptr);
 
-		delete s;
+		delete[] s;
 	}
 }