Added -Woverride-init Makefile flag (#3535)

Makefile

@@ -123,7 +123,7 @@ LIBPATH := -L ../../tools/agbcc/lib
 LIB := $(LIBPATH) -lgcc -lc -L../../libagbsyscall -lagbsyscall
 else
 CC1              = $(shell $(PATH_MODERNCC) --print-prog-name=cc1) -quiet
-override CFLAGS += -mthumb -mthumb-interwork -O2 -mabi=apcs-gnu -mtune=arm7tdmi -march=armv4t -fno-toplevel-reorder -Wno-pointer-to-int-cast -std=gnu17 -Werror -Wall -Wno-strict-aliasing -Wno-attribute-alias
+override CFLAGS += -mthumb -mthumb-interwork -O2 -mabi=apcs-gnu -mtune=arm7tdmi -march=armv4t -fno-toplevel-reorder -Wno-pointer-to-int-cast -std=gnu17 -Werror -Wall -Wno-strict-aliasing -Wno-attribute-alias -Woverride-init
 ifeq ($(ANALYZE),1)
 override CFLAGS += -fanalyzer
 endif
@@ -349,7 +349,7 @@ $(C_BUILDDIR)/librfu_intr.o: CC1 := tools/agbcc/bin/agbcc_arm$(EXE)
 $(C_BUILDDIR)/librfu_intr.o: CFLAGS := -O2 -mthumb-interwork -quiet
 else
 $(C_BUILDDIR)/librfu_intr.o: CFLAGS := -mthumb-interwork -O2 -mabi=apcs-gnu -mtune=arm7tdmi -march=armv4t -fno-toplevel-reorder -Wno-pointer-to-int-cast
-$(C_BUILDDIR)/pokedex_plus_hgss.o: CFLAGS := -mthumb -mthumb-interwork -O2 -mabi=apcs-gnu -mtune=arm7tdmi -march=armv4t -Wno-pointer-to-int-cast -std=gnu17 -Werror -Wall -Wno-strict-aliasing -Wno-attribute-alias
+$(C_BUILDDIR)/pokedex_plus_hgss.o: CFLAGS := -mthumb -mthumb-interwork -O2 -mabi=apcs-gnu -mtune=arm7tdmi -march=armv4t -Wno-pointer-to-int-cast -std=gnu17 -Werror -Wall -Wno-strict-aliasing -Wno-attribute-alias -Woverride-init
 endif
 
 ifeq ($(DINFO),1)