gdb/guile: Have gdbscm_safe_source_script return a unique_ptr

Change gdbscm_safe_source_script to return a
gdb::unique_xmalloc_ptr<char> instead of a raw char*.  Update the
users of this function.

There should be no user visible change after this commit.

gdb/ChangeLog:

	* guile/guile-internal.h (gdbscm_safe_source_script): Change
	function return type.
	* guile/guile.c (gdbscm_source_script): Update to handle change in
	gdbscm_safe_source_script.
	* guile/scm-objfile.c (gdbscm_source_objfile_script): Likewise.
	* guile/scm-safe-call.c (gdbscm_safe_source_script): Change return
	type.

1 files changed, 2 insertions, 2 deletions

diff --git a/gdb/guile/scm-safe-call.c b/gdb/guile/scm-safe-call.c
index 2a38d63..fea4e52 100644
--- a/gdb/guile/scm-safe-call.c
+++ b/gdb/guile/scm-safe-call.c
@@ -431,7 +431,7 @@ scscm_source_scheme_script (void *data)
    printed according to "set guile print-stack" and the result is an error
    message allocated with malloc, caller must free.  */
 
-char *
+gdb::unique_xmalloc_ptr<char>
 gdbscm_safe_source_script (const char *filename)
 {
   /* scm_c_primitive_load_path only looks in %load-path for files with
@@ -452,7 +452,7 @@ gdbscm_safe_source_script (const char *filename)
 			      (void *) filename);
 
   if (result != NULL)
-    return xstrdup (result);
+    return make_unique_xstrdup (result);
   return NULL;
 }