Fixed some issues with null_check_test`

lang/README.md

@@ -1042,11 +1042,27 @@ main := fn(): uint {
 }
 ```
 
+#### inlining_loops
+```hb
+x := 1
+
+foo := fn(): int {
+	loop if true break
+	x = 0
+}
+
+main := fn(): int {
+	@inline(foo)
+	return x
+}
+```
+
 #### null_check_test
 ```hb
-main := fn(): unit {
+main := fn(): uint {
 	ptr := @as(?^uint, null)
-	*ptr = 0
+	value := 0
+	ptr = &value
 
 	if ptr == null {
 		return 1