RP2350: Fix crash when loading ROM drive

Previously there was a read past the end of romdrive_hdr_t.
For some reason this didn't crash on RP2040, but on RP2350 it crashes.

Fixed by using scsiDev buffer instead.

src/ROMDrive.cpp

@@ -131,8 +131,11 @@ bool scsiDiskProgramRomDrive(const char *filename, int scsi_id, int blocksize, S
     hdr.blocksize = blocksize;
     hdr.drivetype = type;
 
+    memset(scsiDev.data, 0, PLATFORM_ROMDRIVE_PAGE_SIZE);
+    memcpy(scsiDev.data, &hdr, sizeof(hdr));
+
     // Program the drive metadata header
-    if (!platform_write_romdrive((const uint8_t*)&hdr, 0, PLATFORM_ROMDRIVE_PAGE_SIZE))
+    if (!platform_write_romdrive(scsiDev.data, 0, PLATFORM_ROMDRIVE_PAGE_SIZE))
     {
         logmsg("---- Failed to program ROM drive header");
         file.close();
@@ -175,4 +178,4 @@ bool romDriveRead(uint8_t *buf, uint32_t start, uint32_t count)
     return platform_read_romdrive(buf, start + PLATFORM_ROMDRIVE_PAGE_SIZE, count);
 }
 
-#endif
+#endif