fixed infinite loop when not branching

tests/1.s

@@ -0,0 +1,40 @@
+	.file	"1.c"
+	.option nopic
+	.attribute arch, "rv32i2p1"
+	.attribute unaligned_access, 0
+	.attribute stack_align, 16
+	.text
+	.align	2
+	.globl	main
+	.type	main, @function
+main:
+	addi	sp,sp,-32
+	sw	s0,28(sp)
+	addi	s0,sp,32
+	li	a5,-2147483648
+	addi	a5,a5,240
+	sw	a5,-20(s0)
+	sw	zero,-24(s0)
+	j	.L2
+.L3:
+	lw	a5,-24(s0)
+	andi	a4,a5,0xff
+	lw	a5,-20(s0)
+	sb	a4,0(a5)
+	lw	a5,-20(s0)
+	addi	a5,a5,1
+	sw	a5,-20(s0)
+	lw	a5,-24(s0)
+	addi	a5,a5,1
+	sw	a5,-24(s0)
+.L2:
+	lw	a4,-24(s0)
+	li	a5,15
+	ble	a4,a5,.L3
+	li	a5,0
+	mv	a0,a5
+	lw	s0,28(sp)
+	addi	sp,sp,32
+	jr	ra
+	.size	main, .-main
+	.ident	"GCC: () 13.2.0"