Hold lock on GetGlobalStateKey() - fixes #652

pkg/iodine/iodine.go

@@ -87,7 +87,9 @@ func GetGlobalState() map[string]string {
 
 // GetGlobalStateKey - get value for key from globalState struct
 func GetGlobalStateKey(k string) string {
+	globalState.RLock()
 	result, ok := globalState.m[k]
+	globalState.RUnlock()
 	if !ok {
 		return ""
 	}