Updated fix for the isvalid gl into pyard.py (#28)

Author: jbrelsf2-nmdp

pyard/pyard.py

@@ -442,8 +442,9 @@ def isvalid(self, allele: str) -> str:
         :return: allele or empty
         :rtype: boolean
         """
-        v = lambda a: a in self.valid
-        return v(allele)
+        if not ismac(allele):
+            return allele in self.valid
+        return True
 
     def isvalid_gl(self, glstring: str) -> str:
         """