Avoid getting warnings about unary - being used on unsigned integer.

diff --git a/crypto/bn/bn_mul.c b/crypto/bn/bn_mul.c
index f730e5d2bf057a0054ecef464df76c71889a6cb4..02273549a0ec1c26950fc318935f475c9054ef7a 100644 (file)
--- a/crypto/bn/bn_mul.c
+++ b/crypto/bn/bn_mul.c
@@ -106,22 +106,22 @@ BN_ULONG bn_sub_part_words(BN_ULONG *r,
                for (;;)
                        {
                        t = b[0];
-                       r[0] = (-t-c)&BN_MASK2;
+                       r[0] = (0-t-c)&BN_MASK2;
                        if (t != 0) c=1;
                        if (++dl >= 0) break;
 
                        t = b[1];
-                       r[1] = (-t-c)&BN_MASK2;
+                       r[1] = (0-t-c)&BN_MASK2;
                        if (t != 0) c=1;
                        if (++dl >= 0) break;
 
                        t = b[2];
-                       r[2] = (-t-c)&BN_MASK2;
+                       r[2] = (0-t-c)&BN_MASK2;
                        if (t != 0) c=1;
                        if (++dl >= 0) break;
 
                        t = b[3];
-                       r[3] = (-t-c)&BN_MASK2;
+                       r[3] = (0-t-c)&BN_MASK2;
                        if (t != 0) c=1;
                        if (++dl >= 0) break;