Workaround 'resource leak' false positives in alloc_MS, bl/envfile_init

* blacklst.c (GC_bl_init): Add assertion that GC_old_stack_bl and
GC_incomplete_stack_bl are both null prior to their assignment (to the
result of GC_scratch_alloc).
* mark.c (alloc_mark_stack): Replace GC_mark_stack_size!=0 with
GC_mark_stack!=NULL (to ensure no memory leak when GC_mark_stack is
assigned for the first time).
* misc.c [GC_READ_ENV_FILE && (MSWIN32 || MSWINCE || CYGWIN32)]
(GC_envfile_init): Add assertion that GC_envfile_content is null prior
to its assignment.

1 files changed, 1 insertions, 1 deletions

diff --git a/mark.c b/mark.c
index e93b433e..f5b9dc49 100644
--- a/mark.c
+++ b/mark.c
@@ -1277,7 +1277,7 @@ static void alloc_mark_stack(size_t n)
 #   endif
 
     GC_mark_stack_too_small = FALSE;
-    if (GC_mark_stack_size != 0) {
+    if (GC_mark_stack != NULL) {
         if (new_stack != 0) {
           if (recycle_old) {
             /* Recycle old space */