fixed another prototype name

main.h

@@ -8,7 +8,7 @@ char *_strcpy(char *dest, char *src);
 char *append(char *str, char c);
 int _puts(char *str);
 int _putchar(char c);
-char *_memset(char *str, int bval);
+char *_memset(char *adr, int bval);
 int fmt(char c, va_list args);
 
 #endif