fix auto processor for text only input

.gitignore

@@ -0,0 +1 @@
+.ipynb_checkpoints

processing_aria.py

@@ -166,6 +166,7 @@ class AriaProcessor(ProcessorMixin):
 
         else:
             image_inputs = {}
+            prompt_strings = text
 
         text_inputs = self.tokenizer(
             prompt_strings,

vision_processor.py

@@ -296,4 +296,4 @@ class AriaVisionProcessor(BaseImageProcessor):
             return_tensors=return_tensors,
             split_image=split_image,
             split_ratio=split_ratio,
-        )
+        )