Guard against null in #visitInnerClass

Issue: SPR-8358,SPR-8186

git-svn-id: https://src.springframework.org/svn/spring-framework/trunk@4344 50f2f4bb-b051-0410-bef5-90022cba6387

org.springframework.core/src/main/java/org/springframework/core/type/classreading/ClassMetadataReadingVisitor.java

@@ -80,9 +80,9 @@ class ClassMetadataReadingVisitor implements ClassVisitor, ClassMetadata {
 	}
 
 	public void visitInnerClass(String name, String outerName, String innerName, int access) {
-		String fqName = ClassUtils.convertResourcePathToClassName(name);
-		String fqOuterName = ClassUtils.convertResourcePathToClassName(outerName);
 		if (outerName != null) {
+			String fqName = ClassUtils.convertResourcePathToClassName(name);
+			String fqOuterName = ClassUtils.convertResourcePathToClassName(outerName);
 			if (this.className.equals(fqName)) {
 				this.enclosingClassName = fqOuterName;
 				this.independentInnerClass = ((access & Opcodes.ACC_STATIC) != 0);