Resolve compile warnings in modern

include/pokenav.h

@@ -4,7 +4,7 @@
 #include "bg.h"
 #include "main.h"
 
-typedef u32 (*LoopedTask)(int state);
+typedef u32 (*LoopedTask)(s32 state);
 
 // Return values of LoopedTask functions.
 #define LT_INC_AND_PAUSE 0
@@ -111,7 +111,7 @@ void sub_81C7850(u32 a0);
 u32 sub_81C786C(void);
 void LoadLeftHeaderGfxForIndex(u32 arg0);
 void sub_81C7FA0(u32 arg0, bool32 arg1, bool32 arg2);
-void sub_81C7AC0(int a0);
+void sub_81C7AC0(s32 a0);
 bool32 sub_81C8010(void);
 void InitBgTemplates(const struct BgTemplate *templates, int count);
 bool32 IsPaletteFadeActive(void);

include/text.h

@@ -166,7 +166,11 @@ struct TextPrinter
 
     void (*callback)(struct TextPrinterTemplate *, u16); // 0x10
 
-    union __attribute__((packed)) {
+    union
+#if !MODERN
+    __attribute__((packed))
+#endif
+    {
         struct TextPrinterSubStruct sub;
         u8 fields[7];
     } subUnion;