Avoid false positive for static scan (integer overflow).

Avoid adding signed type to unsigned one.

Author: mbroz

src/utils_reencrypt.c

@@ -1427,7 +1427,8 @@ static int reencrypt_add_single_token_keyslots(struct crypt_device *cd,
 		if (r < 0)
 			return r;
 
-		count += r;
+		if (r > 0)
+			count++;
 	}
 
 	return count;
@@ -1450,7 +1451,8 @@ static int reencrypt_add_token_keyslots_for_unlock(struct crypt_device *cd,
 		if (r < 0)
 			return r;
 
-		count += r;
+		if (r > 0)
+			count++;
 	}
 
 	return count;