use ui params when retreiving png info fails

Don't want to interrupt the process since batches can be huge. This makes more sense to me than using the previous images parameters

modules/img2img.py

@@ -34,8 +34,13 @@ def process_batch(p, use_png_info, png_info_props, png_info_dir, input_dir, outp
 
     state.job_count = len(images) * p.n_iter
 
+    # extract "default" params to use in case getting png info fails
     prompt = p.prompt
     negative_prompt = p.negative_prompt
+    seed = p.seed
+    cfg_scale = p.cfg_scale
+    sampler_name = p.sampler_name
+    steps = p.steps
 
     for i, image in enumerate(images):
         state.job = f"{i+1} out of {len(images)}"
@@ -86,6 +91,10 @@ def process_batch(p, use_png_info, png_info_props, png_info_dir, input_dir, outp
             except: 
                 p.prompt = prompt
                 p.negative_prompt = negative_prompt
+                p.seed = seed
+                p.cfg_scale = cfg_scale
+                p.sampler_name = sampler_name
+                p.steps = steps
                 print(f"batch png info: using ui set prompts; failed to get png info for {image}")
 
         proc = modules.scripts.scripts_img2img.run(p, *args)