diff -r 0a103bf74f1c -r 12c87d886a75 src/physfs.h
--- a/src/physfs.h	Fri Aug 20 01:25:32 2010 -0400
+++ b/src/physfs.h	Fri Aug 20 02:35:01 2010 -0400
@@ -2320,7 +2320,7 @@
  *
  * Strings that don't fit in the destination buffer will be truncated, but
  *  will always be null-terminated and never have an incomplete UTF-8
- *  sequence at the end.
+ *  sequence at the end. If the buffer length is 0, this function does nothing.
  *
  *   \param src Null-terminated source string in UCS-4 format.
  *   \param dst Buffer to store converted UTF-8 string.
@@ -2342,7 +2342,7 @@
  *
  * Strings that don't fit in the destination buffer will be truncated, but
  *  will always be null-terminated and never have an incomplete UCS-4
- *  sequence at the end.
+ *  sequence at the end. If the buffer length is 0, this function does nothing.
  *
  *   \param src Null-terminated source string in UTF-8 format.
  *   \param dst Buffer to store converted UCS-4 string.
@@ -2365,7 +2365,7 @@
  *
  * Strings that don't fit in the destination buffer will be truncated, but
  *  will always be null-terminated and never have an incomplete UTF-8
- *  sequence at the end.
+ *  sequence at the end. If the buffer length is 0, this function does nothing.
  *
  * Please note that UCS-2 is not UTF-16; we do not support the "surrogate"
  *  values at this time.
@@ -2391,7 +2391,7 @@
  *
  * Strings that don't fit in the destination buffer will be truncated, but
  *  will always be null-terminated and never have an incomplete UCS-2
- *  sequence at the end.
+ *  sequence at the end. If the buffer length is 0, this function does nothing.
  *
  * Please note that UCS-2 is not UTF-16; we do not support the "surrogate"
  *  values at this time.
@@ -2417,7 +2417,7 @@
  *
  * Strings that don't fit in the destination buffer will be truncated, but
  *  will always be null-terminated and never have an incomplete UTF-8
- *  sequence at the end.
+ *  sequence at the end. If the buffer length is 0, this function does nothing.
  *
  * Please note that we do not supply a UTF-8 to Latin1 converter, since Latin1
  *  can't express most Unicode codepoints. It's a legacy encoding; you should