Fix issue 114. Skip app if func_time or rand_time==0

ramp/core/core.py

@@ -1799,6 +1799,8 @@ def generate_load_profile(self, prof_i, peak_time_range, day_type, power):
             or (self.pref_index != 0 and self.user.rand_daily_pref != self.pref_index)
             # checks if the app is allowed in the given yearly behaviour pattern
             or self.wd_we_type not in [day_type, 2]
+            # check if the app has a func_time of 0 (fix issue 114)
+            or self.func_time == 0
         ):
             return
 
@@ -1845,7 +1847,7 @@ def generate_load_profile(self, prof_i, peak_time_range, day_type, power):
         ]
 
         tot_time = 0
-        while tot_time <= rand_time:
+        while tot_time <= rand_time and rand_time!=0:  # Check if rand_time is 0 (-> fix issue 114)
             # one option could be to generate a lot of them at once
             indexes = self.rand_switch_on_window(
                 rand_time=rand_time,  # TODO maybe only consider rand_time-tot_time ...