Update src/cpp/src/module_genai/modules/models/qwen3_5/qwen3_5preprocessor.hpp

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: xipingyan

src/cpp/src/module_genai/modules/models/qwen3_5/qwen3_5preprocessor.hpp

@@ -25,7 +25,7 @@ struct Qwen3_5PreprocessorOutput {
     // Video-specific outputs:
     ov::Tensor pixel_values_videos;
     ov::Tensor video_grid_thw;
-    int video_second_per_grid;
+    int video_second_per_grid = 0;
 };
 
 class Qwen3_5Preprocessor {