olsr: fix more static analysis warnings

src/olsr/model/olsr-header.cc

@@ -53,7 +53,7 @@ SecondsToEmf (double seconds)
   NS_ASSERT_MSG (seconds >= OLSR_C, "SecondsToEmf - Can not convert a value less than OLSR_C");
 
   // find the largest integer 'b' such that: T/C >= 2^b
-  for (b = 0; (seconds / OLSR_C) >= (1 << b); ++b)
+  for (b = 1; (seconds / OLSR_C) >= (1 << b); ++b)
     {
     }
   NS_ASSERT ((seconds / OLSR_C) < (1 << b));

src/olsr/model/olsr-routing-protocol.cc

@@ -1981,9 +1981,8 @@ RoutingProtocol::LinkSensing (const olsr::MessageHeader &msg,
         case OLSR_LOST_LINK:
           linkTypeName = "LOST_LINK";
           break;
-          /*  no default, since lt must be in 0..3, covered above
         default: linkTypeName = "(invalid value!)";
-          */
+          
         }
 
       const char *neighborTypeName;