Possibly fix my Windows CI build

Apparently it doesn't know what SCNx32 and SCNu32 from inttypes.h are.
Not gonna research it deeply but it seems easy to fix, however a bit
nasty, but this isn't gonna be merged into master anyway and can always
be reverted, so here goes.

Author: Daaaav

desktop_version/src/editor.cpp

@@ -27,6 +27,14 @@
 #endif
 #include <inttypes.h>
 
+// Windows NixOS CI doesn't work without this?
+#ifndef SCNx32
+#define SCNx32 "x"
+#endif
+#ifndef SCNu32
+#define SCNu32 "u"
+#endif
+
 edlevelclass::edlevelclass()
 {
     tileset=0;