missed a std:: in histogram

histogram.hpp

@@ -40,7 +40,7 @@ class Histogram : public std::set<HistogramRecord> {
     int hit(const int EventKey, const int Adjustment = 1) {                     // hit() method increments a specific count.
         HistogramRecord E(EventKey);                                            // First, make a record for the event key.
         insert(E);                                                              // Insert the new record (if it's not there).
-        set<HistogramRecord>::iterator iE =                                     // Find either the pre-existing or the new
+        std::set<HistogramRecord>::iterator iE =                                // Find either the pre-existing or the new
           find(E);                                                              // record for this key.
         int* C;                                                                 // Play naughty pointer games to access
         C = const_cast<int*>(&((*iE).Count));                                   // the Count for this record inside the