wintrust: Sign-compare warnings fix

[Andrew Talbot]

Changelog:
    wintrust: Sign-compare warnings fix.

diff --git a/dlls/wintrust/asn.c b/dlls/wintrust/asn.c
index 3a51c91..3132405 100644
--- a/dlls/wintrust/asn.c
+++ b/dlls/wintrust/asn.c
@@ -1115,7 +1115,7 @@ static BOOL CRYPT_GetLen(const BYTE *pbEncoded, DWORD cbEncoded, DWORD *len)
     }
     else if (pbEncoded[1] <= 0x7f)
     {
-        if (pbEncoded[1] + 1 > cbEncoded)
+        if (pbEncoded[1] + 1U > cbEncoded)
         {
             SetLastError(CRYPT_E_ASN1_EOD);
             ret = FALSE;
@@ -1141,7 +1141,7 @@ static BOOL CRYPT_GetLen(const BYTE *pbEncoded, DWORD cbEncoded, DWORD *len)
             SetLastError(CRYPT_E_ASN1_LARGE);
             ret = FALSE;
         }
-        else if (lenLen + 2 > cbEncoded)
+        else if (lenLen + 2U > cbEncoded)
         {
             SetLastError(CRYPT_E_ASN1_CORRUPT);
             ret = FALSE;
@@ -2195,7 +2195,8 @@ static BOOL WINAPI CRYPT_AsnDecodeInt(DWORD dwCertEncodingType,
         }
         else
         {
-            int val, i;
+            int val;
+            DWORD i;
 
             *pcbStructInfo = sizeof(int);
             if (blob->pbData[blob->cbData - 1] & 0x80)
diff --git a/dlls/wintrust/crypt.c b/dlls/wintrust/crypt.c
index 136f795..33cc6de 100644
--- a/dlls/wintrust/crypt.c
+++ b/dlls/wintrust/crypt.c
@@ -349,7 +349,7 @@ static BOOL WINTRUST_GetSignedMsgFromCabFile(SIP_SUBJECTINFO *pSubjectInfo,
     /* get basic offset & size info */
     base_offset = SetFilePointer(pSubjectInfo->hFile, 0L, NULL, SEEK_CUR);
 
-    if (SetFilePointer(pSubjectInfo->hFile, 0, NULL, SEEK_END) == -1)
+    if (SetFilePointer(pSubjectInfo->hFile, 0, NULL, SEEK_END) == INVALID_SET_FILE_POINTER)
     {
         TRACE("seek error\n");
         return FALSE;
@@ -357,7 +357,7 @@ static BOOL WINTRUST_GetSignedMsgFromCabFile(SIP_SUBJECTINFO *pSubjectInfo,
 
     cabsize = SetFilePointer(pSubjectInfo->hFile, 0L, NULL, SEEK_CUR);
     if ((cabsize == -1) || (base_offset == -1) ||
-     (SetFilePointer(pSubjectInfo->hFile, base_offset, NULL, SEEK_SET) == -1))
+     (SetFilePointer(pSubjectInfo->hFile, base_offset, NULL, SEEK_SET) == INVALID_SET_FILE_POINTER))
     {
         TRACE("seek error\n");
         return FALSE;
@@ -453,7 +453,7 @@ static BOOL WINTRUST_GetSignedMsgFromCabFile(SIP_SUBJECTINFO *pSubjectInfo,
         SetLastError(ERROR_INSUFFICIENT_BUFFER);
         return FALSE;
     }
-    if (SetFilePointer(pSubjectInfo->hFile, cert_offset, NULL, SEEK_SET) == -1)
+    if (SetFilePointer(pSubjectInfo->hFile, cert_offset, NULL, SEEK_SET) == INVALID_SET_FILE_POINTER)
     {
         ERR("couldn't seek to cert location\n");
         return FALSE;