libtiff: spelling fixes per

https://github.com/libsdl-org/libtiff/commit/389e67fbe205d418bf5a3b6aa68cb1bb2a15028c

From 389e67fbe205d418bf5a3b6aa68cb1bb2a15028c Mon Sep 17 00:00:00 2001
From: Lee Howard <[EMAIL REDACTED]>
Date: Sun, 12 Dec 2010 01:44:51 +0000
Subject: [PATCH] spelling fixes per
 http://bugzilla.maptools.org/show_bug.cgi?id=2144

---
 man/TIFFReadDirectory.3tiff  | 10 +++++-----
 man/TIFFWriteDirectory.3tiff |  4 ++--
 man/tiffcrop.1               |  4 ++--
 3 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/man/TIFFReadDirectory.3tiff b/man/TIFFReadDirectory.3tiff
index d4c2ac26..af3866f0 100644
--- a/man/TIFFReadDirectory.3tiff
+++ b/man/TIFFReadDirectory.3tiff
@@ -1,4 +1,4 @@
-.\" $Id: TIFFReadDirectory.3tiff,v 1.2 2005-11-02 11:07:18 dron Exp $
+.\" $Id: TIFFReadDirectory.3tiff,v 1.2.2.1 2010-12-12 01:44:51 faxguy Exp $
 .\"
 .\" Copyright (c) 1988-1997 Sam Leffler
 .\" Copyright (c) 1991-1997 Silicon Graphics, Inc.
@@ -119,20 +119,20 @@ This error is not fatal.
 An unknown tag was encountered in the directory;
 the library ignores all such tags.
 .PP
-\fBTIFF directory is missing requred "ImageLength" field\fP.
+\fBTIFF directory is missing required "ImageLength" field\fP.
 The image violates the specification by not having a necessary field.
 There is no way for the library to recover from this error.
 .PP
-\fBTIFF directory is missing requred "PlanarConfig" field\fP.
+\fBTIFF directory is missing required "PlanarConfig" field\fP.
 The image violates the specification by not having a necessary field.
 There is no way for the library to recover from this error.
 .PP
-\fBTIFF directory is missing requred "StripOffsets" field\fP.
+\fBTIFF directory is missing required "StripOffsets" field\fP.
 The image has multiple strips, but is missing the tag that
 specifies the file offset to each strip of data.
 There is no way for the library to recover from this error.
 .PP
-\fBTIFF directory is missing requred "TileOffsets" field\fP.
+\fBTIFF directory is missing required "TileOffsets" field\fP.
 The image has multiple tiles, but is missing the tag that
 specifies the file offset to each tile of data.
 There is no way for the library to recover from this error.
diff --git a/man/TIFFWriteDirectory.3tiff b/man/TIFFWriteDirectory.3tiff
index 93173cf9..84661a31 100644
--- a/man/TIFFWriteDirectory.3tiff
+++ b/man/TIFFWriteDirectory.3tiff
@@ -1,4 +1,4 @@
-.\" $Id: TIFFWriteDirectory.3tiff,v 1.2 2005-11-02 11:07:18 dron Exp $
+.\" $Id: TIFFWriteDirectory.3tiff,v 1.2.2.1 2010-12-12 01:44:51 faxguy Exp $
 .\"
 .\" Copyright (c) 1988-1997 Sam Leffler
 .\" Copyright (c) 1991-1997 Silicon Graphics, Inc.
@@ -61,7 +61,7 @@ have an established location in the file.  It will rewrite the directory,
 but instead of place it at it's old location (as 
 .IR TIFFWriteDirectory
 would) it will place them at the end of the file, correcting the pointer from
-the preceeding directory or file header to point to it's new location.  This
+the preceding directory or file header to point to it's new location.  This
 is particularly important in cases where the size of the directory and
 pointed to data has grown, so it won't fit in the space available at the
 old location.
diff --git a/man/tiffcrop.1 b/man/tiffcrop.1
index f5cffd5b..5d3b56d1 100644
--- a/man/tiffcrop.1
+++ b/man/tiffcrop.1
@@ -1,4 +1,4 @@
-.\" $Id: tiffcrop.1,v 1.1.2.4 2010-06-11 22:24:23 bfriesen Exp $
+.\" $Id: tiffcrop.1,v 1.1.2.5 2010-12-12 01:44:51 faxguy Exp $
 .\" tiffcrop -- a port of tiffcp.c extended to include extended processing of images
 .\" 
 .\" Original code:
@@ -522,7 +522,7 @@ bit depts of 16, 24, 32 and 64 bits per sample.
 Not all images can be converted from one compression scheme to another.
 Data with some photometric interpretations and/or bit depths are tied to 
 specific compression schemes and vice-versa, e.g. Group 3/4 compression
-is only usable for bilevel data. JPEG compression is only useable on 8
+is only usable for bilevel data. JPEG compression is only usable on 8
 bit per sample data (or 12 bit if 
 .I LibTIFF
 was compiled with 12 bit JPEG support). Support for OJPEG compressed