rsaenh: Cast-qual warning fix

[Andrew Talbot]

Changelog:
    rsaenh: Cast-qual warning fix.

diff -urN a/dlls/rsaenh/implglue.c b/dlls/rsaenh/implglue.c
--- a/dlls/rsaenh/implglue.c	2006-09-29 15:47:00.000000000 +0100
+++ b/dlls/rsaenh/implglue.c	2006-11-13 19:00:14.000000000 +0000
@@ -42,7 +42,7 @@
 VOID WINAPI MD5Final( MD5_CTX *ctx );
 /* Function prototypes copied from dlls/advapi32/crypt_sha.c */
 VOID WINAPI A_SHAInit(PSHA_CTX Context);
-VOID WINAPI A_SHAUpdate(PSHA_CTX Context, PCHAR Buffer, UINT BufferSize);
+VOID WINAPI A_SHAUpdate(PSHA_CTX Context, const unsigned char *Buffer, UINT BufferSize);
 VOID WINAPI A_SHAFinal(PSHA_CTX Context, PULONG Result);
 /* Function prototype copied from dlls/advapi32/crypt.c */
 BOOL WINAPI SystemFunction036(PVOID pbBuffer, ULONG dwLen);
@@ -89,7 +89,7 @@
             break;
         
         case CALG_SHA:
-            A_SHAUpdate(&pHashContext->sha, (PCHAR)pbData, dwDataLen);
+            A_SHAUpdate(&pHashContext->sha, pbData, dwDataLen);
             break;
         
         default: