[Typechecker] Perform capture analysis in enums as well

Author: theblixguy

lib/Sema/TypeCheckDecl.cpp

@@ -2589,6 +2589,8 @@ class DeclChecker : public DeclVisitor<DeclChecker> {
 
     checkAccessControl(TC, ED);
 
+    TC.checkPatternBindingCaptures(ED);
+
     if (ED->hasRawType() && !ED->isObjC()) {
       // ObjC enums have already had their raw values checked, but pure Swift
       // enums haven't.