[gparted] Constify string parameters to add_mountpoint_entry()

[Mike Fleetwood <mfleetwo src gnome org>]

commit 12e709920bd69ec6923cd82fe5234c1544c632d3
Author: Mike Fleetwood <mike fleetwood googlemail com>
Date:   Fri May 27 22:49:14 2022 +0100

    Constify string parameters to add_mountpoint_entry()
    
    add_mountpoint_entry() doesn't modify the passed strings so use
    pass-by-constant-reference.  This avoids pass-by-value and having to
    construct copies of the strings just to pass them to this method.

 include/Mount_Info.h | 8 ++++----
 src/Mount_Info.cc    | 8 ++++----
 2 files changed, 8 insertions(+), 8 deletions(-)
---
diff --git a/include/Mount_Info.h b/include/Mount_Info.h
index ae4a6513..a39dc279 100644
--- a/include/Mount_Info.h
+++ b/include/Mount_Info.h
@@ -58,10 +58,10 @@ public:
 
 private:
        static void read_mountpoints_from_file( const Glib::ustring & filename, MountMapping & map );
-       static void add_mountpoint_entry( MountMapping & map,
-                                         Glib::ustring & node,
-                                         bool readonly,
-                                         Glib::ustring& mountpoint);
+       static void add_mountpoint_entry(MountMapping& map,
+                                        const Glib::ustring& node,
+                                        bool readonly,
+                                        const Glib::ustring& mountpoint);
        static bool parse_readonly_flag( const Glib::ustring & str );
        static void read_mountpoints_from_file_swaps( const Glib::ustring & filename,
                                                      MountMapping & map );
diff --git a/src/Mount_Info.cc b/src/Mount_Info.cc
index 81dd5e44..c3d5a7cd 100644
--- a/src/Mount_Info.cc
+++ b/src/Mount_Info.cc
@@ -172,10 +172,10 @@ void Mount_Info::read_mountpoints_from_file( const Glib::ustring & filename, Mou
 }
 
 
-void Mount_Info::add_mountpoint_entry( MountMapping & map,
-                                       Glib::ustring & node,
-                                       bool readonly,
-                                       Glib::ustring& mountpoint)
+void Mount_Info::add_mountpoint_entry(MountMapping& map,
+                                      const Glib::ustring& node,
+                                      bool readonly,
+                                      const Glib::ustring& mountpoint)
 {
        // Only add node path if mount point exists
        if ( file_test( mountpoint, Glib::FILE_TEST_EXISTS ) )