fix random seeds to actually randomize

Without this fix, manual seeds get locked in.

modules/text_generation.py

@@ -1,3 +1,4 @@
+import random
 import re
 import time
 import traceback
@@ -97,10 +98,11 @@ def formatted_outputs(reply, model_name):
 
 
 def set_manual_seed(seed):
-    if seed != -1:
-        torch.manual_seed(seed)
-        if torch.cuda.is_available():
-            torch.cuda.manual_seed_all(seed)
+    if seed == -1:
+        seed = random.randint(1, 2**31)
+    torch.manual_seed(seed)
+    if torch.cuda.is_available():
+        torch.cuda.manual_seed_all(seed)
 
 
 def stop_everything_event():