Add conversion for char/varchar

Author: hazzik

src/NHibernate/Dialect/Schema/PostgreSQLMetadata.cs

@@ -157,6 +157,11 @@ private static string Normalize(string typeName)
 					return "int8";
 			}
 
+			if (typeName.StartsWith("character"))
+			{
+				return typeName.Replace("character varying", "varchar").Replace("character", "char");
+			}
+			
 			if (typeName.EndsWith("with timezone"))
 			{
 				return (typeName.StartsWith("timestamp")
@@ -169,7 +174,7 @@ private static string Normalize(string typeName)
 			{
 				return typeName.Replace("without timezone", "").Trim();
 			}
-			
+
 			return typeName;
 		}
 	}