Try to convince coverity not to worryh about this loop

diff --git a/src/ext/ed25519/donna/modm-donna-64bit.h b/src/ext/ed25519/donna/modm-donna-64bit.h
index a47a38a42d4842d660295e811623ddb72a73efba..b22df2be75e830320affedd9799916a785b80ffb 100644 (file)
--- a/src/ext/ed25519/donna/modm-donna-64bit.h
+++ b/src/ext/ed25519/donna/modm-donna-64bit.h
@@ -240,7 +240,8 @@ contract256_window4_modm(signed char r[64], const bignum256modm in) {
 static void
 contract256_slidingwindow_modm(signed char r[256], const bignum256modm s, int windowsize) {
        int i,j,k,b;
-       int m = (1 << (windowsize - 1)) - 1, soplen = 256;
+       int m = (1 << (windowsize - 1)) - 1;
+        const int soplen = 256;
        signed char *bits = r;
        bignum256modm_element_t v;