backport valgrind cleanups from 6.0-engines

mysql-test/valgrind.supp:
  silence valgrind warning of memory leak in dlopen
strings/strmake.c:
  silence valgrind warning cause by strlen examining unset bytes.

1 files changed, 3 insertions, 3 deletions

diff --git a/strings/strmake.c b/strings/strmake.c
index df8d78e8476..2d5fa5e36aa 100644
--- a/strings/strmake.c
+++ b/strings/strmake.c
@@ -41,9 +41,9 @@ char *strmake(register char *dst, register const char *src, size_t length)
     write a character rather than '\0' as this makes spotting these
     problems in the results easier.
   */
-  uint n= strlen(src) + 1;
-  if (n <= length)
-    memset(dst + n, (int) 'Z', length - n + 1);
+  uint n= 0;
+  while (n < length && src[n++]);
+  memset(dst + n, (int) 'Z', length - n + 1);
 #endif
 
   while (length--)