winspool.drv/tests: Write-strings warnings fix

[Andrew Talbot]

Changelog:
    winspool.drv/tests: Write-strings warnings fix.

diff -urN a/dlls/winspool.drv/tests/info.c b/dlls/winspool.drv/tests/info.c
--- a/dlls/winspool.drv/tests/info.c	2006-07-16 15:08:30.000000000 +0100
+++ b/dlls/winspool.drv/tests/info.c	2006-07-25 21:06:30.000000000 +0100
@@ -42,7 +42,7 @@
 
 struct monitor_entry {
     LPSTR  env;
-    LPSTR  dllname;
+    CHAR  dllname[MAX_PATH];
 };
 
 /* report common behavior only once */