Fix documentation in yarn.h for yarn_prefix.

yarn.c

@@ -1,6 +1,6 @@
 /* yarn.c -- generic thread operations implemented using pthread functions
  * Copyright (C) 2008, 2012 Mark Adler
- * Version 1.2  8 Jan 2012  Mark Adler
+ * Version 1.2  13 Jan 2012  Mark Adler
  * For conditions of distribution and use, see copyright notice in yarn.h
  */
 
@@ -13,8 +13,9 @@
    1.0    19 Oct 2008  First version
    1.1    26 Oct 2008  No need to set the stack size -- remove
                        Add yarn_abort() function for clean-up on error exit
-   1.2     8 Jan 2012  Add large file #define for consistency with pigz.c
+   1.2    13 Jan 2012  Add large file #define for consistency with pigz.c
                        Update thread portability #defines per IEEE 1003.1-2008
+                       Fix documentation in yarn.h for yarn_prefix
  */
 
 /* for thread portability */

yarn.h

@@ -1,6 +1,6 @@
 /* yarn.h -- generic interface for thread operations
  * Copyright (C) 2008, 2011 Mark Adler
- * Version 1.2  8 Jan 2012  Mark Adler
+ * Version 1.2  13 Jan 2012  Mark Adler
  */
 
 /*
@@ -100,9 +100,9 @@
 
    -- Error control --
 
-   yarn_name - a char pointer to a string that will be the prefix for any error
-        messages that these routines generate before exiting -- if not changed
-        by the application, "yarn" will be used
+   yarn_prefix - a char pointer to a string that will be the prefix for any
+        error messages that these routines generate before exiting -- if not
+        changed by the application, "yarn" will be used
    yarn_abort - an external function that will be executed when there is an
         internal yarn error, due to out of memory or misuse -- this function
         may exit to abort the application, or if it returns, the yarn error