Don't suppress frame interrupt when display is disabled

After doing a hardware test that isolates the state changes made to the hardware in space squash's boot routine, it seems that the frame start interrupt fires regardless of the display hardware's enable state.

Note that this change breaks mario tennis (see 7423524 and 0ff9c61); there must be something in there that we haven't found yet that's supposed to suppress the interrupt instead.

rustual-boy-core/src/vip/mod.rs

@@ -588,12 +588,12 @@ impl Vip {
     fn frame_clock(&mut self, raise_interrupt: &mut bool) {
         logln!(Log::Vip, "Frame clock rising edge");
 
-        if self.reg_display_control_display_enable {
-            self.reg_interrupt_pending_start_of_display_frame = true;
-            if self.reg_interrupt_enable_start_of_display_frame {
-                *raise_interrupt = true;
-            }
+        self.reg_interrupt_pending_start_of_display_frame = true;
+        if self.reg_interrupt_enable_start_of_display_frame {
+            *raise_interrupt = true;
+        }
 
+        if self.reg_display_control_display_enable {
             self.begin_display_process();
         }