Lagrange [release]

Fixed build on macOS 10.13

=> 9448ea25b1026e3ee14c8581b2c25d13f86a075f

diff --git a/src/app.c b/src/app.c
index 7a48bead..39636c29 100644
--- a/src/app.c
+++ b/src/app.c
@@ -469,7 +469,7 @@ const iString *debugInfo_App(void) {
     return msg;
 }
 
-iLocalDef iBool isWaitingAllowed_App_(const iApp *d) {
+iLocalDef iBool isWaitingAllowed_App_(iApp *d) {
     return !value_Atomic(&d->pendingRefresh) && isEmpty_SortedArray(&d->tickers);
 }