gcc 4.0 -Wpointer-sign fixes (Reg* functions).

diff --git a/dlls/shell32/classes.c b/dlls/shell32/classes.c
index a360bee..8c4c1d8 100644
--- a/dlls/shell32/classes.c
+++ b/dlls/shell32/classes.c
@@ -194,7 +194,7 @@
 	char sTemp[MAX_PATH];
 	char  sNum[5];
 
-	if (!RegQueryValueExA(hkey, NULL, 0, &dwType, szDest, &len))
+	if (!RegQueryValueExA(hkey, NULL, 0, &dwType, (LPBYTE)szDest, &len))
 	{
       if (dwType == REG_EXPAND_SZ)
 	  {
@@ -319,7 +319,7 @@
 	szDest[0] = 0;
 	if (HCR_RegOpenClassIDKey(riid, &hkey))
 	{
-	  if (!RegQueryValueExA(hkey,"",0,NULL,szDest,&len))
+	  if (!RegQueryValueExA(hkey,"",0,NULL,(LPBYTE)szDest,&len))
 	  {
 	    ret = TRUE;
 	  }