ole32: Constify a variable (and fix a typo concerning its level of indirection)

[Andrew Talbot]

Changelog:
    ole32: Constify a variable (and fix a typo concerning its level of indirection).

diff -urN a/dlls/ole32/ifs.c b/dlls/ole32/ifs.c
--- a/dlls/ole32/ifs.c	2007-05-06 14:25:44.000000000 +0100
+++ b/dlls/ole32/ifs.c	2007-07-05 21:30:05.000000000 +0100
@@ -116,7 +116,7 @@
         return 1;
 }
 
-static int RemoveMemoryLocation(LPVOID * pMem)
+static int RemoveMemoryLocation(LPCVOID pMem)
 {
         LPVOID * Current;