[UnCLIPPipeline] fix num_images_per_prompt (#1762)

duplicate maks for num_images_per_prompt

src/diffusers/pipelines/unclip/pipeline_unclip.py

@@ -143,6 +143,7 @@ class UnCLIPPipeline(DiffusionPipeline):
 
         text_embeddings = text_embeddings.repeat_interleave(num_images_per_prompt, dim=0)
         text_encoder_hidden_states = text_encoder_hidden_states.repeat_interleave(num_images_per_prompt, dim=0)
+        text_mask = text_mask.repeat_interleave(num_images_per_prompt, dim=0)
 
         if do_classifier_free_guidance:
             uncond_tokens = [""] * batch_size
@@ -172,6 +173,7 @@ class UnCLIPPipeline(DiffusionPipeline):
             uncond_text_encoder_hidden_states = uncond_text_encoder_hidden_states.view(
                 batch_size * num_images_per_prompt, seq_len, -1
             )
+            uncond_text_mask = uncond_text_mask.repeat(1, num_images_per_prompt)
 
             # done duplicates