Fixed compiler warning

Fixes #187

Note: w should remain a signed integer, so w-1 is correctly compared in
the FOR_T loop.

diff --git a/src/monocypher.c b/src/monocypher.c
index dd488e0571d7e9420d749f803389871fa93c5a96..f5f93fcfb8856c999239980e54aa762be05f586c 100644 (file)
--- a/src/monocypher.c
+++ b/src/monocypher.c
@@ -1843,7 +1843,7 @@ static int slide_step(slide_ctx *ctx, int width, int i, const u8 scalar[32])
                        | (((lsb & 0xF0) != 0) << 2));
             ctx->next_index  = (i16)(i-(w-1)+s);
             ctx->next_digit  = (i8) (v >> s   );
-            ctx->next_check -= w;
+            ctx->next_check -= (u8) w;
         }
     }
     return i == ctx->next_index ? ctx->next_digit: 0;