Revert "pbx_ael: Global variables are not expanded."

This reverts commit c448dcd2f0.

Reason for revert: Behavior change that breaks existing dialplan.

ASTERISK-30472 #close

Change-Id: I20e44b4081d6ee0fe54cde44ac71dcf2d146f909

res/ael/pval.c

@@ -4414,11 +4414,7 @@ int ast_compile_ael2(struct ast_context **local_contexts, struct ast_hashtab *lo
 {
 	pval *p,*p2;
 	struct ast_context *context;
-#ifdef LOW_MEMORY
 	char buf[2000];
-#else
-	char buf[8192];
-#endif
 	struct ael_extension *exten;
 	struct ael_extension *exten_list = 0;
 
@@ -4431,13 +4427,9 @@ int ast_compile_ael2(struct ast_context **local_contexts, struct ast_hashtab *lo
 		case PV_GLOBALS:
 			/* just VARDEC elements */
 			for (p2=p->u1.list; p2; p2=p2->next) {
-#ifdef STANDALONE
+				char buf2[2000];
-				snprintf(buf, sizeof(buf), "%s=%s", p2->u1.str, p2->u2.val);
+				snprintf(buf2,sizeof(buf2),"%s=%s", p2->u1.str, p2->u2.val);
-				pbx_builtin_setvar(NULL, buf);
+				pbx_builtin_setvar(NULL, buf2);
-#else
-				pbx_substitute_variables_helper(NULL, p2->u2.val, buf, sizeof(buf) - 1);
-				pbx_builtin_setvar_helper(NULL, p2->u1.str, buf);
-#endif
 			}
 			break;
 		default: