Fix use_gpu argument in assign_device function to respect use_torch parameter

Author: mrariden

cellpose/core.py

@@ -77,7 +77,7 @@ def assign_device(use_torch=True, gpu=False, device=0):
     if isinstance(device, str):
         if device != "mps" or not(gpu and torch.backends.mps.is_available()):
             device = int(device)
-    if gpu and use_gpu(gpu_number=device, use_torch=True):
+    if gpu and use_gpu(gpu_number=device, use_torch=use_torch):
         try:
             if torch.cuda.is_available():
                 device = torch.device(f'cuda:{device}')