glibc.malloc.check: Fix nit in documentation

The tunable will not work with *any* non-zero tunable value since its
list of allowed values is 0-3.  Fix the documentation to reflect that.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

1 files changed, 5 insertions, 5 deletions

diff --git a/manual/memory.texi b/manual/memory.texi
index 28ec2e4e63..31ee36be8c 100644
--- a/manual/memory.texi
+++ b/manual/memory.texi
@@ -1364,11 +1364,11 @@ The block was already freed.
 Another possibility to check for and guard against bugs in the use of
 @code{malloc}, @code{realloc} and @code{free} is to set the environment
 variable @code{MALLOC_CHECK_}.  When @code{MALLOC_CHECK_} is set to a
-non-zero value, a special (less efficient) implementation is used which
-is designed to be tolerant against simple errors, such as double calls
-of @code{free} with the same argument, or overruns of a single byte
-(off-by-one bugs).  Not all such errors can be protected against,
-however, and memory leaks can result.
+non-zero value less than 4, a special (less efficient) implementation is
+used which is designed to be tolerant against simple errors, such as
+double calls of @code{free} with the same argument, or overruns of a
+single byte (off-by-one bugs).  Not all such errors can be protected
+against, however, and memory leaks can result.
 
 Any detected heap corruption results in immediate termination of the
 process.