pbx.c: Make pbx_substitute_variables_helper_full() not mask variables.

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/12@397977 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/pbx.c

@@ -4479,11 +4479,12 @@ void pbx_substitute_variables_helper_full(struct ast_channel *c, struct varshead
 
 			/* Substitute if necessary */
 			if (needsub) {
-				size_t used;
-				if (!ltmp)
-					ltmp = ast_alloca(VAR_BUF_SIZE);
+				size_t my_used;
 
-				pbx_substitute_variables_helper_full(c, headp, var, ltmp, VAR_BUF_SIZE - 1, &used);
+				if (!ltmp) {
+					ltmp = ast_alloca(VAR_BUF_SIZE);
+				}
+				pbx_substitute_variables_helper_full(c, headp, var, ltmp, VAR_BUF_SIZE - 1, &my_used);
 				vars = ltmp;
 			} else {
 				vars = var;
@@ -4568,11 +4569,12 @@ void pbx_substitute_variables_helper_full(struct ast_channel *c, struct varshead
 
 			/* Substitute if necessary */
 			if (needsub) {
-				size_t used;
-				if (!ltmp)
-					ltmp = ast_alloca(VAR_BUF_SIZE);
+				size_t my_used;
 
-				pbx_substitute_variables_helper_full(c, headp, var, ltmp, VAR_BUF_SIZE - 1, &used);
+				if (!ltmp) {
+					ltmp = ast_alloca(VAR_BUF_SIZE);
+				}
+				pbx_substitute_variables_helper_full(c, headp, var, ltmp, VAR_BUF_SIZE - 1, &my_used);
 				vars = ltmp;
 			} else {
 				vars = var;