Index: /trunk/src/VBox/GuestHost/OpenGL/util/error.c
===================================================================
--- /trunk/src/VBox/GuestHost/OpenGL/util/error.c	(revision 41375)
+++ /trunk/src/VBox/GuestHost/OpenGL/util/error.c	(revision 41376)
@@ -339,5 +339,5 @@
             {
                 crGetProcName(pname, 1024);
-                sprintf(str, "%s_%s_%d.txt", fnamePrefix, pname,
+                sprintf(str, "%s_%s_%u.txt", fnamePrefix, pname,
 #ifdef RT_OS_WINDOWS
                         GetCurrentProcessId()