Fix bug with drawing scan progress before calling ui.init()

This triggered an invalid integer cast that wasn't caught with Zig's
LLVM backend, but it did trigger on the native x86_64 backend.

src/sink.zig

@@ -451,7 +451,9 @@ pub fn draw() void {
     switch (main.config.scan_ui.?) {
         .none => {},
         .line => drawConsole(),
-        .full => switch (global.state) {
+        .full => {
+            ui.init();
+            switch (global.state) {
                 .done => {},
                 .err => drawError(),
                 .zeroing => {
@@ -470,6 +472,7 @@ pub fn draw() void {
                     }
                 },
                 .running => drawProgress(),
+            }
         },
     }
 }