[lldb] Added assert to VerifyDecl

We could VerifyDecl sometimes with a nullptr. It would be nice if we
could get an actual assert here instead of triggering UB.

llvm-svn: 365247

lldb/source/Symbol/VerifyDecl.cpp

@@ -9,4 +9,7 @@
 #include "lldb/Symbol/VerifyDecl.h"
 #include "clang/AST/DeclBase.h"
 
-void lldb_private::VerifyDecl(clang::Decl *decl) { decl->getAccess(); }
+void lldb_private::VerifyDecl(clang::Decl *decl) {
+  assert(decl && "VerifyDecl called with nullptr?");
+  decl->getAccess();
+}