[libglnx] fdio: Fix compilation via C++

[Colin Walters <walters src gnome org>]

commit efcacc4c5fc8a94d3a202c6c6549c155a14600e4
Author: Colin Walters <walters verbum org>
Date:   Sun Nov 22 19:06:14 2020 +0000

    fdio: Fix compilation via C++
    
    I may use https://cxx.rs/ in rpm-ostree, which means we
    need our dependencies' headers to build in C++ mode.

 glnx-fdio.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/glnx-fdio.h b/glnx-fdio.h
index cc1ed4b..40931bf 100644
--- a/glnx-fdio.h
+++ b/glnx-fdio.h
@@ -43,7 +43,7 @@ G_BEGIN_DECLS
 static inline
 const char *glnx_basename (const char *path)
 {
-  gchar *base = strrchr (path, G_DIR_SEPARATOR);
+  const gchar *base = strrchr (path, G_DIR_SEPARATOR);
 
   if (base)
     return base + 1;
@@ -55,7 +55,7 @@ const char *glnx_basename (const char *path)
 static inline void
 glnx_stdio_file_cleanup (void *filep)
 {
-  FILE *f = filep;
+  FILE *f = (FILE*)filep;
   if (f)
     fclose (f);
 }