updated for version 7.3.925
Problem:    Typos in source files.
Solution:   Fix the typos. (Ken Takata)
diff --git a/src/os_win16.h b/src/os_win16.h
index 98f0ece..c5a89c8 100644
--- a/src/os_win16.h
+++ b/src/os_win16.h
@@ -50,7 +50,7 @@
 #endif
 
 /* toupper() is not really broken, but it's very slow.	Probably because of
- * using unicde characters on Windows NT */
+ * using unicode characters on Windows NT */
 #define BROKEN_TOUPPER
 
 #define FNAME_ILLEGAL "\"*?><|" /* illegal characters in a file name */