Fix plaintext header definition

diff --git a/src/insets/InsetArgument.h b/src/insets/InsetArgument.h
index b2693a49a0d30d69c48418fa7a8b0bde78116d6b..76b6f0143b9b83284db5ef8d46286c0f696f6f0a 100644 (file)
--- a/src/insets/InsetArgument.h
+++ b/src/insets/InsetArgument.h
@@ -49,7 +49,7 @@ public:
        ///
        void latex(otexstream &, OutputParams const &) const { }
        ///
-       int plaintext(odocstringstream &, OutputParams const &, int) const { return 0; }
+       int plaintext(odocstringstream &, OutputParams const &, size_t) const { return 0; }
        ///
        int docbook(odocstream &, OutputParams const &) const { return 0; }
        ///