Spring 4.0 TypeResolver regression bug

@see https://jira.springsource.org/browse/SPR-11354 : Regression from 3.2.x for FormattingConversionService.addFormatterForFieldType

How to test ?

• git clone the repository
• do mvn package

The module spring-3.2-working-test will SUCCEED,

but the module spring-4.0-failing-test will FAIL with :

Running org.springframework.format.support.SpringGenericTypeResolverTest
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.081 sec : FAILURE!
testType(org.springframework.format.support.SpringGenericTypeResolverTest)  Time elapsed: 0.045 sec  : ERROR!
java.lang.IllegalArgumentException: Type must not be null
	at org.springframework.util.Assert.notNull(Assert.java:112)
	at org.springframework.core.convert.TypeDescriptor.valueOf(TypeDescriptor.java:507)
	at org.springframework.format.support.FormattingConversionService$PrinterConverter.(FormattingConversionService.java:123)
	at org.springframework.format.support.FormattingConversionService.addFormatterForFieldType(FormattingConversionService.java:80)
	at org.springframework.format.support.SpringGenericTypeResolverTest.register(SpringGenericTypeResolverTest.java:19)
	at org.springframework.format.support.SpringGenericTypeResolverTest.testType(SpringGenericTypeResolverTest.java:13)