remove bool define and require c99 to silence

Author: jopadan

Makefile

@@ -4,7 +4,7 @@ MSBUILD := MSBuild.exe
 DEFINES := -DDR_MULTIPLAYER -DIPXNET -DDR_LETTERBOX #-DDR_CDCHECK
 INCLUDES := -I/usr/include/SDL2
 FLAGS ?= -O3
-FLAGS += -Werror -Wno-unused-result
+FLAGS += -std=c99 -Werror -Wno-unused-result
 LDFLAGS := -lm -lSDL2 -lSDL2_net
 
 OBJS := data.o bss.o

db_ipx.c

@@ -1,5 +1,6 @@
 #include <stdio.h>
 #include <string.h>
+#include <stdbool.h>
 
 #include "drally_ipx.h"
 
@@ -12,10 +13,6 @@
 
 #define CONVIPX(hostvar) hostvar[0], hostvar[1], hostvar[2], hostvar[3], hostvar[4], hostvar[5]
 
-typedef int             bool;
-#define true            1
-#define false           0
-
 typedef unsigned char   Bit8u;
 typedef signed short    Bit16s;
 typedef unsigned short  Bit16u;