util: allocate null terminator on fresh str

tesselslate · tesselslate · commit 10d7943511f5 · 2025-12-29T23:30:13.000-05:00
This has been a lurking issue for a while. I think there were just never
any cases where an empty str got used.
diff --git a/waywall/util/str.c b/waywall/util/str.c
@@ -46,6 +46,6 @@ str_free(str str) {
 
 str
 str_new() {
-    struct hdr *hdr = zalloc(1, sizeof(*hdr));
+    struct hdr *hdr = zalloc(1, sizeof(*hdr) + 1);
     return hdrstr(hdr);
 }

Original file line number	Diff line number	Diff line change
`@@ -46,6 +46,6 @@ str_free(str str) {`
`46`	`46`
`47`	`47`	`str`
`48`	`48`	`str_new() {`
`49`		`- struct hdr hdr = zalloc(1, sizeof(hdr));`
	`49`	`+ struct hdr hdr = zalloc(1, sizeof(hdr) + 1);`
`50`	`50`	`return hdrstr(hdr);`
`51`	`51`	`}`