replace () with (void) in function definitions

`()` means that any amt of arguments will be accepted, which isn't what
i want

1 files changed, 1 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index d9078f0..4ecac81 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@ PATH   := $(shell pwd)/toolchain/bin/:$(PATH)
 
 AS      = i686-elf-as
 CC      = i686-elf-gcc
-CFLAGS  = -std=gnu99 -ffreestanding -O2 -Wall -Wextra
+CFLAGS  = -std=gnu99 -ffreestanding -O2 -Wall -Wextra -Wold-style-declaration -Wold-style-definition
 CFLAGS += -mgeneral-regs-only
 CFLAGS += -Isrc/
 LFLAGS  = -ffreestanding -O2 -nostdlib -lgcc