Fix out-of-bound loop UB (#218)

* avoid ub

* format

* torch

src/engine/fox_context.c

@@ -50,7 +50,11 @@ s32 D_ctx_80177B50[7];
 s32 D_ctx_80177B70[7];
 PlanetId D_ctx_80177B90[7];
 s32 D_ctx_80177BB0[7];
+#ifdef AVOID_UB
+s32 D_ctx_80177BD8[24];
+#else
 s32 D_ctx_80177BD8[22]; // overruns gPrevPlanetTeamShields?
+#endif
 s32 gPrevPlanetTeamShields[6];
 s32 D_ctx_80177C58[6];
 u8 gSoundMode;

src/engine/fox_save.c

@@ -68,7 +68,11 @@ s32 Save_Read(void) {
         (void) "ＥＥＰＲＯＭ ＲＯＭ［０］ 正常\n";
         return 0;
     }
+#ifdef AVOID_UB
+    for (i = 0; i < sizeof(SaveData); i++) {
+#else
     for (i = 0; i <= sizeof(SaveData); i++) { // should be <, but gets overwritten immediately.
+#endif
         gSaveFile.save.raw[i] = gSaveFile.backup.raw[i];
     }
     gSaveFile.save.checksum = gSaveFile.backup.checksum;