Fix warning about signed/unsigned

diff --git a/src/insets/InsetListings.cpp b/src/insets/InsetListings.cpp
index 0693b5af848c8d34d3f383c3c654000491ef8027..b5a5701817aebe74db5e876179c281a065e02400 100644 (file)
--- a/src/insets/InsetListings.cpp
+++ b/src/insets/InsetListings.cpp
@@ -125,7 +125,7 @@ void InsetListings::latex(otexstream & os, OutputParams const & runparams) const
                // then remove the relative options.
                vector<string> opts =
                        getVectorFromString(param_string, ",", false);
-               for (int i = 0; i < opts.size(); ++i) {
+               for (size_t i = 0; i < opts.size(); ++i) {
                        if (prefixIs(opts[i], "float")) {
                                if (prefixIs(opts[i], "float="))
                                        float_placement = opts[i].substr(6);