Fix: replace 'continue' with 'break' to return first fitting time-range

in findNextWorkTimeRange().

library/src/calculator_functions.cpp

@@ -265,7 +265,7 @@ int Calculator::findNextWorkTimeRange(QDateTime const &dt,
 
         if (dt.time() < worktime_from) {
             nextWorkTimeRange = w;
-            continue;
+            break;
         }
     }
     return nextWorkTimeRange;