Only set the output in trans.sink when not min pwr

When we receive a GotoMin message, we immediately go to lower power
before entering the PE_SRC_Transition_Sink state.  Therefore, the call
to pdb_dpm_output_set was redundant in this case.  Now the call isn't
made in this case, removing the redundancy.  This also leads somewhat
into the design of the new library.

src/policy_engine.c

             explicit_contract = true;
 
             /* Set the output appropriately */
-            pdb_dpm_output_set(capability_match && !min_power);
+            if (!min_power) {
+                pdb_dpm_output_set(capability_match);
+            }
 
             chPoolFree(&pdb_msg_pool, policy_engine_message);
             policy_engine_message = NULL;