[MEMALLOC] Add pushstackmark

This patch gets rid of the stack mark tracking hack by allocating a little
bit of stack memory if we're at risk of planting a stack mark which may be
grown later.  To do this a new function pushstackmark is added which lets
the user pick a bigger amount to allocate since some users do that anyway
after setting a stack mark.

1 files changed, 1 insertions, 2 deletions

diff --git a/src/parser.c b/src/parser.c
index f49ee7d..d0e0553 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -1487,8 +1487,7 @@ setprompt(int which)
 	show = !el;
 #endif
 	if (show) {
-		setstackmark(&smark);
-		stalloc(stackblocksize());
+		pushstackmark(&smark, stackblocksize());
 		out2str(getprompt(NULL));
 		popstackmark(&smark);
 	}