Clean up and ensure proper usage of alloca()

This replaces all calls to alloca() with ast_alloca() which calls gcc's
__builtin_alloca() to avoid BSD semantics and removes all NULL checks
on memory allocated via ast_alloca() and ast_strdupa().

(closes issue ASTERISK-20125)
Review: https://reviewboard.asterisk.org/r/2032/
Patch-by: Walter Doekes (wdoekes)
........

Merged revisions 370642 from http://svn.asterisk.org/svn/asterisk/branches/1.8
........

Merged revisions 370643 from http://svn.asterisk.org/svn/asterisk/branches/10


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@370655 65c4cc65-6c06-0410-ace0-fbb531ad65f3

1 files changed, 1 insertions, 1 deletions

diff --git a/main/db.c b/main/db.c
index 9d5fe1c70..42a4b9c65 100644
--- a/main/db.c
+++ b/main/db.c
@@ -192,7 +192,7 @@ static int db_open(void)
 	char *dbname;
 	struct stat dont_care;
 
-	if (!(dbname = alloca(strlen(ast_config_AST_DB) + sizeof(".sqlite3")))) {
+	if (!(dbname = ast_alloca(strlen(ast_config_AST_DB) + sizeof(".sqlite3")))) {
 		return -1;
 	}
 	strcpy(dbname, ast_config_AST_DB);