[minor] some updates

pylot/RELEASE-VERSION

@@ -1 +1 @@
-60a2-dirty
+819e-dirty

pylot/core/io/phases.py

@@ -255,10 +255,15 @@ def picksdict_from_picks(evt):
             lpp = mpp + pick.time_errors.upper_uncertainty
             epp = mpp - pick.time_errors.lower_uncertainty
         except TypeError as e:
-            msg = e + ',\n falling back to symmetric uncertainties'
+            if not spe:
+                msg = 'No uncertainties found for pick: {}. Uncertainty set to 0'.format(pick)
+                lpp = mpp
+                epp = mpp
+            else:
+                msg = str(e) + ',\n falling back to symmetric uncertainties'
+                lpp = mpp + spe
+                epp = mpp - spe
             warnings.warn(msg)
-            lpp = mpp + spe
-            epp = mpp - spe
         phase['mpp'] = mpp
         phase['epp'] = epp
         phase['lpp'] = lpp

pylot/core/util/widgets.py

@@ -987,6 +987,7 @@ class PylotCanvas(FigureCanvas):
 
                 times = [time for index, time in enumerate(time_ax) if not index % nth_sample]
                 data = [datum + n for index, datum in enumerate(trace.data) if not index % nth_sample]
+                ax.axhline(n, color="0.5", lw=0.5)
                 ax.plot(times, data, color=linecolor, linewidth=0.7)
                 if noiselevel is not None:
                     for level in [-noiselevel[channel], noiselevel[channel]]: