DFReader: fix recv_match bug

Author: robertlong13

DFReader.py

@@ -1016,7 +1016,7 @@ def recv_match(self, condition=None, type=None, blocking=False):
             if type is not None:
                 # If we don't have any conditions, we don't need skip_to_type
                 # to add extra key messages to "type"
-                strict = condition is not None
+                strict = condition is None
                 self.skip_to_type(type, strict=strict)
             m = self.recv_msg()
             if m is None: