connect to infura with -l

mythril/mythril.py

@@ -335,9 +335,9 @@ class Mythril(object):
                     verbose_report=False, max_depth=12):
 
         all_issues = []
+        if self.dynld and self.eth is None:
+            self.set_api_rpc_infura()
         for contract in (contracts or self.contracts):
-            if self.eth is None:
-                self.set_api_rpc_infura()
             sym = SymExecWrapper(contract, address,
                                  dynloader=DynLoader(self.eth) if self.dynld else None,
                                  max_depth=max_depth)