Re-fix square.h warning to avoid a compile error under MSVC

[stockfish] / src / square.h

diff --git a/src/square.h b/src/square.h
index 4f024c961df33b8c3c40caed7617b1b14196ccf9..9683e930652e5f3bf3cd11a413ec3474c7b6690d 100644 (file)
--- a/src/square.h
+++ b/src/square.h
@@ -164,7 +164,7 @@ inline File file_from_char(char c) {
 }
 
 inline char file_to_char(File f) {
-  return char(f - FILE_A) + 'a';
+  return char(f - FILE_A + int('a'));
 }
 
 inline Rank rank_from_char(char c) {
@@ -172,7 +172,7 @@ inline Rank rank_from_char(char c) {
 }
 
 inline char rank_to_char(Rank r) {
-  return char(r - RANK_1) + '1';
+  return char(r - RANK_1 + int('1'));
 }
 
 inline Square square_from_string(const std::string& str) {