Expand headroom for preventing arithmetic overflow from 2 to 10, to allow for rounding up to a multiple of 8 in bitmap computations

git-svn-id: http://svn.code.sf.net/p/netpbm/code/trunk@4155 9d0c8265-081b-0410-96cb-a4ca84ce46f8

1 files changed, 4 insertions, 4 deletions

diff --git a/lib/libpbm2.c b/lib/libpbm2.c
index a35004f9..1ad93534 100644
--- a/lib/libpbm2.c
+++ b/lib/libpbm2.c
@@ -69,12 +69,12 @@ validateComputableSize(unsigned int const cols,
    you expect.  That failed expectation can be disastrous if you use
    it to allocate memory.
 
-   A common operation is adding 1 or 2 to the highest row or
-   column number in the image, so we make sure that's possible.
+   See comments at 'validateComputableSize' in libpam.c for details on
+   the purpose of these validations.
 -----------------------------------------------------------------------------*/
-    if (cols > INT_MAX - 2)
+    if (cols > INT_MAX - 10)
         pm_error("image width (%u) too large to be processed", cols);
-    if (rows > INT_MAX - 2)
+    if (rows > INT_MAX - 10)
         pm_error("image height (%u) too large to be processed", rows);
 }