tools/pyic_ice_diag.py: Typo corrected.

tools/pyic_ice_diag.py

@@ -88,7 +88,7 @@ if 'time' in ds.dims:
   if iopts.time=='none':
     ds = ds.isel(time=iopts.it)
   else:
-    ds = ds.sel(time=iops.time, method='nearest')
+    ds = ds.sel(time=iopts.time, method='nearest')
 
 clon = np.rad2deg(ds.clon.compute())
 clat = np.rad2deg(ds.clat.compute())