Fix a compiler wrning

diff --git a/simgear/misc/sg_path.cxx b/simgear/misc/sg_path.cxx
index 0d5140eb94d2e3925484d2d6ae01c826b1222608..2ae206a05e5b469e62c5d76b1cb7c12cb6711707 100644 (file)
--- a/simgear/misc/sg_path.cxx
+++ b/simgear/misc/sg_path.cxx
@@ -991,7 +991,7 @@ std::wstring SGPath::wstr() const
    wchar_t wideBuf = malloc(buflen * sizeof(int));
    if (wideBuf) {
        size_t count = mbstowcs(wideBuf, path.c_str(), buflen);
-       if (count == -1) {
+       if (count == (size_t)-1) {
            return std::wstring();
        }