Null Pointer Exception when User Defined Type is not found.

[boutier]

In the following, copy() should not be called when resolveType() fails.

spring-data-cassandra/spring-data-cassandra/src/main/java/org/springframework/data/cassandra/core/convert/DefaultColumnTypeResolver.java

Lines 449 to 452 in d681841

	com.datastax.oss.driver.api.core.type.UserDefinedType userType = userTypeResolver.resolveType(identifier)
	.copy(frozen);
	if (userType == null) {

		com.datastax.oss.driver.api.core.type.UserDefinedType userType = userTypeResolver.resolveType(identifier)
-				.copy(frozen);

		if (userType == null) {
			throw new MappingException(String.format("User type [%s] not found", identifier));
		}

-		return userType;
+		return userType.copy(frozen);

[mp911de]

That's clearly a bug. Care to submit a pull request?