Add sanitizer flags to debug build

Makefile

@@ -1,5 +1,6 @@
 basic_flags := -std=c99 -pipe -Wall -Wpedantic -Wextra -Werror=implicit-function-declaration
 debug_flags := -DDEBUG -O0 -ggdb -feliminate-unused-debug-symbols
+sanitize_flags := -fsanitize=address -fsanitize=leak -fsanitize=undefined
 release_flags := -DNDEBUG -O2 -s -D_FORTIFY_SOURCE=2 -fstack-protector-strong -fpie -Wl,-pie
 library_flags := -lncurses
 source_files := main.c
@@ -14,7 +15,7 @@ build/debug build/release: | build
 
 .PHONY: debug
 debug: | build/debug
-	cc $(basic_flags) $(debug_flags) $(source_files) -o build/debug/acro $(library_flags)
+	cc $(basic_flags) $(debug_flags) $(sanitize_flags) $(source_files) -o build/debug/acro $(library_flags)
 
 .PHONY: release
 release: | build/release