fix: set default mode to 24 hours (#2166)

src/RTC.cpp

@@ -40,7 +40,7 @@ RTC::RTC(melonDS::NDS& nds) : NDS(nds)
 
     // indicate the power was off
     // this will be changed if a previously saved RTC state is loaded
-    State.StatusReg1 = 0x80;
+    State.StatusReg1 = 0x80 | (1<<1);
 }
 
 RTC::~RTC()
@@ -943,4 +943,4 @@ void RTC::Write(u16 val, bool byte)
         IO = (IO & 0x0001) | (val & 0xFFFE);
 }
 
-}
+}