[glib] More const-correctness fixes

[Philip Withnall <pwithnall src gnome org>]

commit 9365e212f8007412a9221d5240c82080ed3ede93
Author: Philip Withnall <withnall endlessm com>
Date:   Thu Apr 26 15:34:55 2018 +0100

    More const-correctness fixes
    
    This continues one of the const-correctness fixes from the previous
    commit (it needed some more transitive fixes), and reverts another of
    them, since it was over-zealous.
    
    This fixes CI failure: https://gitlab.gnome.org/GNOME/glib/-/jobs/27125.
    
    Signed-off-by: Philip Withnall <withnall endlessm com>
    Reviewed-by: nobody

 gio/tests/file.c  | 2 +-
 glib/gbacktrace.c | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/gio/tests/file.c b/gio/tests/file.c
index baf0bd745..919f8f598 100644
--- a/gio/tests/file.c
+++ b/gio/tests/file.c
@@ -153,7 +153,7 @@ typedef struct
   gint monitor_created;
   gint monitor_deleted;
   gint monitor_changed;
-  const gchar *monitor_path;
+  gchar *monitor_path;
   gint pos;
   const gchar *data;
   gchar *buffer;
diff --git a/glib/gbacktrace.c b/glib/gbacktrace.c
index 5300c6838..d29f4fad6 100644
--- a/glib/gbacktrace.c
+++ b/glib/gbacktrace.c
@@ -81,7 +81,7 @@
 
 
 #ifndef G_OS_WIN32
-static void stack_trace (char **args);
+static void stack_trace (const char * const *args);
 #endif
 
 /* People want to hit this from their debugger... */
@@ -269,7 +269,7 @@ stack_trace_sigchld (int signum)
 }
 
 static void
-stack_trace (char **args)
+stack_trace (const char * const *args)
 {
   pid_t pid;
   int in_fd[2];
@@ -301,7 +301,7 @@ stack_trace (char **args)
       close (1); dup (out_fd[1]);  /* set the stdout to the out pipe */
       close (2); dup (out_fd[1]);  /* set the stderr to the out pipe */
 
-      execvp (args[0], args);      /* exec gdb */
+      execvp (args[0], (char **) args);      /* exec gdb */
 
       /* Print failure to original stderr */
       close (2); dup (old_err);