fix(read): fixing the infinite loop on the read function

- The original will infinite loop

src/ft_read.s

@@ -5,11 +5,13 @@ section .text
 	global ft_read
 
 ft_read:
+	cmp rsi, 0				; check if the buffer is NULL
+	je .exit				; if true go to exit
 	mov rax, 0				; syscall 0 is for read
 	syscall					; call the system call read
 	cmp rax, 0				; check if the return value of syscall
 	jl .error				; jump if the syscall return less than 0 
-	ret						; return the value of the syscall
+	jmp .exit				; jump to exit
 
 .error:
 	mov rdi, rax			; stock errno value in rdi
@@ -17,4 +19,7 @@ ft_read:
 	call __errno_location	; rax = &errno
 	mov [rax], edi			; stock the errno return in the address of rax
 	mov rax, -1				; set the value of rax to -1
-	ret						; return with -1 (and errno value)
+	jmp .exit				; jump to exit
+
+.exit:
+	ret