Update checknullpointer.h

Author: chrchr-github

lib/checknullpointer.h

@@ -70,8 +70,8 @@ class CPPCHECKLIB CheckNullPointer : public Check {
     /**
      * @brief parse a function call and extract information about variable usage
      * @param tok first token
-     * @param var variables that the function read / write.
      * @param library --library files data
+     * @return list of variables that the function reads / writes.
      */
     static std::list<const Token*> parseFunctionCall(const Token &tok,
                                   const Library &library, bool checkNullArg = true);