Fix IGRA release time parsing

Use the four-character HHMM field width when converting release times so both hour digits are preserved. Add a regression for 11:42.

Author: Sanjays2402

src/siphon/simplewebservice/igra2.py

@@ -201,7 +201,7 @@ def _cflag(val):
         def _ctime(strformat='MMMSS'):
             """Return a function converting a string from MMMSS or HHMM to seconds."""
             def _ctime_strformat(val):
-                time = val.strip().zfill(5)
+                time = val.strip().zfill(5 if strformat == 'MMMSS' else 4)
 
                 if int(time) < 0 or int(time) == 9999:
                     return np.nan

tests/test_igra2.py

@@ -56,6 +56,13 @@ def subsetter(response):
     return subsetter
 
 
+def test_release_time_converter_uses_hhmm_width():
+    """Test that release times preserve both hour digits when converted."""
+    converter = IGRAUpperAir()._get_fwf_params()['header']['converters']['release_time']
+
+    assert converter('1142') == 11 * 3600 + 42 * 60
+
+
 @recorder.use_cassette('igra2_sounding',
                        before_record_response=subset_date(datetime(2010, 6, 1)))
 def test_igra2():