Mksquashfs: flags should be set using TRUE/FALSE and not 0/1

Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
diff --git a/squashfs-tools/mksquashfs.c b/squashfs-tools/mksquashfs.c
index 0873ed5..7e501f8 100644
--- a/squashfs-tools/mksquashfs.c
+++ b/squashfs-tools/mksquashfs.c
@@ -82,17 +82,23 @@
 
 /* filesystem flags for building */
 int comp_opts = FALSE;
-int no_xattrs = XATTR_DEF, noX = 0;
-int duplicate_checking = 1, noF = 0, no_fragments = 0, always_use_fragments = 0;
-int noI = 0, noD = 0;
+int no_xattrs = XATTR_DEF;
+int noX = FALSE;
+int duplicate_checking = TRUE;
+int noF = FALSE;
+int no_fragments = FALSE;
+int always_use_fragments = FALSE;
+int noI = FALSE;
+int noD = FALSE;
 int silent = TRUE;
-long long global_uid = -1, global_gid = -1;
 int exportable = TRUE;
 int sparse_files = TRUE;
 int old_exclude = TRUE;
 int use_regex = FALSE;
 int nopad = FALSE;
 
+long long global_uid = -1, global_gid = -1;
+
 /* superblock attributes */
 int block_size = SQUASHFS_FILE_SIZE, block_log;
 unsigned int id_count = 0;
@@ -248,10 +254,10 @@
 int threads;
 
 /* flag whether destination file is a block device */
-int block_device = 0;
+int block_device = FALSE;
 
 /* flag indicating whether files are sorted using sort list(s) */
-int sorted = 0;
+int sorted = FALSE;
 
 /* save destination file name for deleting on error */
 char *destination_file = NULL;
@@ -297,7 +303,7 @@
 
 /* compression operations */
 static struct compressor *comp = NULL;
-int compressor_opt_parsed = 0;
+int compressor_opt_parsed = FALSE;
 void *stream = NULL;
 
 /* xattr stats */