epicsStrPrintEscaped() operate on unterminated string

see 3a2d225682
see f488765631

modules/libcom/src/misc/epicsString.c

@@ -234,7 +234,7 @@ int epicsStrPrintEscaped(FILE *fp, const char *s, size_t len)
    if (fp == NULL)
        return -1;
 
-   if (s == NULL || strlen(s) == 0 || len == 0)
+   if (s == NULL || len == 0)
        return 0; // No work to do
 
    while (len--) {

modules/libcom/src/misc/epicsString.h

@@ -119,6 +119,9 @@ LIBCOM_API char * epicsStrnDup(const char *s, size_t len);
  * \param fp  File descriptor to print to
  * \param s   String to print
  * \param n   Length of string
+ * \return Number of characters printed, or negative on error.
+ *
+ * \since 7.0.8 until UNRELEASED, @code strlen(s) @endcode must be valid.
  */
 LIBCOM_API int epicsStrPrintEscaped(FILE *fp, const char *s, size_t n);