Clang import; Set function pointer properly

lib/clangimport.cpp

@@ -127,8 +127,10 @@ namespace clangimport {
             Decl(Token *def, Variable *var) : def(def), function(nullptr), var(var) {}
             Decl(Token *def, Function *function) : def(def), function(function), var(nullptr) {}
             void ref(Token *tok) {
+                if (function)
                     tok->function(function);
                 tok->varId(var ? var->declarationId() : 0);
+                if (var)
                     tok->variable(var);
             }
             Token *def;