dmloader: Constify some variables.

dlls/dmloader/debug.c

diff --git a/dlls/dmloader/debug.c b/dlls/dmloader/debug.c
index 7dba67d..fd13c42 100644
--- a/dlls/dmloader/debug.c
+++ b/dlls/dmloader/debug.c
@@ -56,7 +56,7 @@
 }
 
 /* DMUS_VERSION struct to string conversion for debug messages */
-const char *debugstr_dmversion (LPDMUS_VERSION version) {
+const char *debugstr_dmversion (const DMUS_VERSION *version) {
 	if (!version) return "'null'";
 	return wine_dbg_sprintf ("\'%i,%i,%i,%i\'",
 		HIWORD(version->dwVersionMS),LOWORD(version->dwVersionMS),
@@ -83,7 +83,7 @@
 }
 
 /* FILETIME struct to string conversion for debug messages */
-const char *debugstr_filetime (LPFILETIME time) {
+const char *debugstr_filetime (const FILETIME *time) {
 	SYSTEMTIME sysTime;
 
 	if (!time) return "'null'";