Make sure that floppy icons and options do not appear if there's no floppy controller available

src/floppy/fdc.c

@@ -79,6 +79,8 @@ int floppyrate[4];
 
 int fdc_current[FDC_MAX] = { 0, 0 };
 
+volatile int fdcinited = 0;
+
 #ifdef ENABLE_FDC_LOG
 int fdc_do_log = ENABLE_FDC_LOG;
 
@@ -2337,6 +2339,8 @@ fdc_close(void *priv)
 
     fifo_close(fdc->fifo_p);
 
+    fdcinited = 0;
+
     free(fdc);
 }
 
@@ -2382,6 +2386,8 @@ fdc_init(const device_t *info)
 
     fdc_reset(fdc);
 
+    fdcinited = 1;
+
     return fdc;
 }
 

src/qt/qt_machinestatus.cpp

@@ -40,6 +40,8 @@ extern "C" {
 #include <86box/ui.h>
 #include <86box/machine_status.h>
 #include <86box/config.h>
+
+extern volatile int fdcinited;
 };
 
 #include <QIcon>
@@ -303,6 +305,9 @@ MachineStatus::hasSCSI()
 void
 MachineStatus::iterateFDD(const std::function<void(int)> &cb)
 {
+    if (!fdcinited)
+        return;
+
     for (int i = 0; i < FDD_NUM; ++i) {
         if (fdd_get_type(i) != 0) {
             cb(i);