datafind.DataCache: match to all subtypes when not set

gstlal/python/datafind.py

@@ -48,7 +48,7 @@ class DataFileMixin:
 		return T050017_filename(ifos, self.description(svd_bin, subtype), span, self.extension)
 
 	def file_pattern(self, svd_bin=None, subtype=None):
-		return f"*-*{self.description(svd_bin, subtype)}-*-*{self.extension}"
+		return f"*-*{self.description(svd_bin, subtype)}*-*-*{self.extension}"
 
 	def directory(self, root=None, start=None):
 		path = self.name.lower()