fix iOS recovery handler

PanoPainter/main.cpp

@@ -11,7 +11,7 @@
 #include "objc_utils.h"
 
 int main(int argc, char * argv[]) {
-    //install_global_handlers();
+    install_global_handlers();
     @autoreleasepool {
         return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
     }