Ensure version of generated class is correct

Important to ensure we generate it of the right version as it may
end up containing code derived from a particular class that needs
a be run with a certain level of verifier. In this case if
inserting invokestatic targeting a interface method, we need to
be using something later than a java 1.2 level class file.

weaver/src/org/aspectj/weaver/bcel/BcelShadow.java

@@ -3059,6 +3059,7 @@ public class BcelShadow extends Shadow {
 
 		LazyClassGen closureClass = new LazyClassGen(closureClassName, superClassName, getEnclosingClass().getFileName(),
 				Modifier.PUBLIC, new String[] {}, getWorld());
+		closureClass.setMajorMinor(getEnclosingClass().getMajor(), getEnclosingClass().getMinor());
 		InstructionFactory fact = new InstructionFactory(closureClass.getConstantPool());
 
 		// constructor