warning fix

simgear/environment/visual_enviro.cxx

@@ -737,7 +737,7 @@ void SGEnviro::drawLightning(void) {
   return;
 	list_of_lightning::iterator iLightning;
 	// play 'thunder' for lightning
-	if( snd_active )
+	if( snd_active ) {
 		if( !snd_playing ) {
 			// wait until sound has reached us
 			snd_timer += dt;
@@ -765,6 +765,7 @@ void SGEnviro::drawLightning(void) {
 			}
 		}
 
+	}
 	if( ! lightning_enable_state )
 		return;
 

simgear/props/props.cxx

@@ -519,6 +519,8 @@ SGPropertyNode::clearValue ()
             }
             _local_val.string_val = 0;
             break;
+        default: // avoid compiler warning
+            break;
         }
         delete _value.val;
         _value.val = 0;
@@ -1592,6 +1594,8 @@ std::ostream& SGPropertyNode::printOn(std::ostream& stream) const
         break;
     case props::NONE:
         break;
+    default: // avoid compiler warning
+        break;
     }
     return stream;
 }

simgear/props/props.hxx

@@ -1861,6 +1861,8 @@ T SGPropertyNode::getValue(typename boost::disable_if_c<simgear::props
     case UNSPECIFIED:
         return simgear::parseString<T>(make_string());
         break;
+    default: // avoid compiler warning
+        break;
     }
     return SGRawValue<T>::DefaultValue();
 }

simgear/props/props_io.cxx

@@ -437,6 +437,8 @@ getTypeName (simgear::props::Type type)
   case props::ALIAS:
   case props::NONE:
     return "unspecified";
+  default: // avoid compiler warning
+    break;
   }
 
   // keep the compiler from squawking