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, 7 deletions

diff --git a/gdb/guile/scm-objfile.c b/gdb/guile/scm-objfile.c
index 30e63f3..cc8bbe6 100644
--- a/gdb/guile/scm-objfile.c
+++ b/gdb/guile/scm-objfile.c
@@ -310,16 +310,11 @@ gdbscm_source_objfile_script (const struct extension_language_defn *extlang,
 			      struct objfile *objfile, FILE *file,
 			      const char *filename)
 {
-  char *msg;
-
   ofscm_current_objfile = objfile;
 
-  msg = gdbscm_safe_source_script (filename);
+  gdb::unique_xmalloc_ptr<char> msg = gdbscm_safe_source_script (filename);
   if (msg != NULL)
-    {
-      fprintf_filtered (gdb_stderr, "%s", msg);
-      xfree (msg);
-    }
+    fprintf_filtered (gdb_stderr, "%s", msg.get ());
 
   ofscm_current_objfile = NULL;
 }