Reacted on compiler warnings of Debian 13 Sid about IsoStreamIface.type

libisofs/eltorito.c

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2007 Vreixo Formoso
- * Copyright (c) 2010 - 2024 Thomas Schmitt
+ * Copyright (c) 2010 - 2025 Thomas Schmitt
  *
  * This file is part of the libisofs project; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License version 2 
@@ -1149,7 +1149,7 @@ void catalog_free(IsoStream *stream)
 
 IsoStreamIface catalog_stream_class = {
     0,
-    "boot",
+    {'b', 'o', 'o', 't'},
     catalog_open,
     catalog_close,
     catalog_get_size,

libisofs/filters/external.c

@@ -637,7 +637,7 @@ int extf_cmp_ino(IsoStream *s1, IsoStream *s2);
 
 IsoStreamIface extf_stream_class = {
     4,
-    "extf",
+    {'e', 'x', 't', 'f'},
     extf_stream_open,
     extf_stream_close,
     extf_stream_get_size,

libisofs/filters/gzip.c

@@ -579,7 +579,7 @@ int gzip_uncompress_cmp_ino(IsoStream *s1, IsoStream *s2);
 
 IsoStreamIface gzip_stream_compress_class = {
     4,
-    "gzip",
+    {'g', 'z', 'i', 'p'},
     gzip_stream_open,
     gzip_stream_close,
     gzip_stream_get_size,
@@ -596,7 +596,7 @@ IsoStreamIface gzip_stream_compress_class = {
 
 IsoStreamIface gzip_stream_uncompress_class = {
     4,
-    "pizg",
+    {'p', 'i', 'z', 'g'},
     gzip_stream_open,
     gzip_stream_close,
     gzip_stream_get_size,

libisofs/filters/zisofs.c

@@ -1282,7 +1282,7 @@ int ziso_uncompress_cmp_ino(IsoStream *s1, IsoStream *s2);
 
 IsoStreamIface ziso_stream_compress_class = {
     4,
-    "ziso",
+    {'z', 'i', 's', 'o'},
     ziso_stream_open,
     ziso_stream_close,
     ziso_stream_get_size,
@@ -1299,7 +1299,7 @@ IsoStreamIface ziso_stream_compress_class = {
 
 IsoStreamIface ziso_stream_uncompress_class = {
     4,
-    "osiz",
+    {'o', 's', 'i', 'z'},
     ziso_stream_open,
     ziso_stream_close,
     ziso_stream_get_size,

libisofs/stream.c

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2007 Vreixo Formoso
- * Copyright (c) 2009 - 2022 Thomas Schmitt
+ * Copyright (c) 2009 - 2025 Thomas Schmitt
  *
  * This file is part of the libisofs project; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License version 2 
@@ -210,7 +210,7 @@ int fsrc_clone_stream(IsoStream *old_stream, IsoStream **new_stream,
 static
 IsoStreamIface fsrc_stream_class = {
     4, /* version */
-    "fsrc",
+    {'f', 's', 'r', 'c'},
     fsrc_open,
     fsrc_close,
     fsrc_get_size,
@@ -498,7 +498,7 @@ int cut_out_clone_stream(IsoStream *old_stream, IsoStream **new_stream,
 static
 IsoStreamIface cut_out_stream_class = {
     4, /* version */
-    "cout",
+    {'c', 'o', 'u', 't'},
     cut_out_open,
     cut_out_close,
     cut_out_get_size,
@@ -742,7 +742,7 @@ int mem_clone_stream(IsoStream *old_stream, IsoStream **new_stream,
 static
 IsoStreamIface mem_stream_class = {
     4, /* version */
-    "mem ",
+    {'m', 'e', 'm', ' '},
     mem_open,
     mem_close,
     mem_get_size,