Fixed compilation with GCC11

Makefile

 all:
 	tar xf libselinux-3.0.tar.gz
+	patch -Np1 -d libselinux-3.0 < libselinux-3.0-gcc11_fix.patch
 	$(MAKE) -C libselinux-3.0
 	$(MAKE) -C libselinux-3.0 install
 	rm -rf libselinux-3.0
\ No newline at end of file

libselinux-3.0-gcc11_fix.patch

+diff -uNr libselinux-3.0/src/label_file.h libselinux-3.0-free_fix/src/label_file.h
+--- libselinux-3.0/src/label_file.h	2019-11-28 23:16:48.000000000 +1030
++++ libselinux-3.0-free_fix/src/label_file.h	2024-07-28 21:53:28.368696603 +0930
+@@ -286,7 +286,6 @@
+ 		tmp_arr = realloc(data->stem_arr,
+ 				  sizeof(*tmp_arr) * alloc_stems);
+ 		if (!tmp_arr) {
+-			free(buf);
+ 			return -1;
+ 		}
+ 		data->alloc_stems = alloc_stems;
+@@ -308,6 +307,7 @@
+ 	int stem_len = get_stem_from_spec(buf);
+ 	int stemid;
+ 	char *stem;
++	int r;
+ 
+ 	if (!stem_len)
+ 		return -1;
+@@ -321,7 +321,11 @@
+ 	if (!stem)
+ 		return -1;
+ 
+-	return store_stem(data, stem, stem_len);
++	r = store_stem(data, stem, stem_len);
++	if (r < 0)
++		free(stem);
++
++	return r;
+ }
+ 
+ /* This will always check for buffer over-runs and either read the next entry