Fixed bug when comparing an uppercase with an lowercase QTH locator

edi.py

@@ -976,13 +976,13 @@ def compare_qso(log1, qso1, log2, qso2):
         raise ValueError('Serial number mismatch')
 
     # compare qth
-    if log1.maidenhead_locator != qso2.qso_fields['wwl']:
+    if log1.maidenhead_locator.upper() != qso2.qso_fields['wwl'].upper():
         raise ValueError('Qth locator mismatch (other ham)')
-    if log2.maidenhead_locator != qso1.qso_fields['wwl']:
+    if log2.maidenhead_locator.upper() != qso1.qso_fields['wwl'].upper():
         raise ValueError('Qth locator mismatch')
 
     # calculate & return distance
-    return qth_distance(log1.maidenhead_locator, log2.maidenhead_locator)
+    return qth_distance(log1.maidenhead_locator.upper(), log2.maidenhead_locator.upper())
 
 
 def mark_older_logs(log_list):

test_edi.py

@@ -1054,6 +1054,8 @@ def test_compare_qso(self, mock_isfile):
             edi.LogQso('130803;1200;YO5AAA;6;59;001;59;001;;ZZ16ZZ;1;;;;', 1, _rules),
             # qso with long serial (29)
             edi.LogQso('130803;1200;YO5AAA;6;59;0001;59;001;;KN16AA;1;;;;', 1, _rules),
+            # qso with lowercase qthlocator (30)
+            edi.LogQso('130803;1200;YO5AAA;6;59;0001;59;001;;KN16aa;1;;;;', 1, _rules),
         ]
 
         qso_test = (
@@ -1130,6 +1132,9 @@ def test_compare_qso(self, mock_isfile):
             # valid test with long serial
             (qso_list[0], qso_list[29], 1, None, None),
             (qso_list[29], qso_list[0], 1, None, None),
+            # valid test with lowercase qthlocator
+            (qso_list[0], qso_list[30], 1, None, None),
+            (qso_list[30], qso_list[0], 1, None, None),
 
         )