Fix an infinite loop issue in GTK+ (Issue #1439)

Author: michaelrsweet

CHANGES.md

@@ -10,6 +10,7 @@ Changes in CUPS v2.4.16 (YYYY-MM-DD)
 - The web interface did not support domain usernames fully (Issue #1441)
 - Made the presence of the "JobPrivateXxx" and "SubscriptionPrivateXxx"
   directives outside a Policy an informational warning.
+- Fixed an infinite loop issue in the GTK+ print dialog (Issue #1439)
 
 
 Changes in CUPS v2.4.15 (2025-11-27)

cups/http.c

@@ -2779,7 +2779,7 @@ _httpUpdate(http_t        *http,	/* I - HTTP connection */
     /* See whether our read buffer is full... */
     DEBUG_printf(("2_httpUpdate: used=%d", http->used));
 
-    if (http->used > 0 && !memchr(http->buffer, '\n', (size_t)http->used) && (size_t)http->used < sizeof(http->buffer))
+    if (http->used < sizeof(http->buffer))
     {
       /* No, try filling in more data... */
       if ((bytes = http_read(http, http->buffer + http->used, sizeof(http->buffer) - (size_t)http->used, /*timeout*/0)) > 0)