decode_base64: Allow '=' padding character

'=' is a valid character, but minetest.decode_base64 returned nil when it was used for padding.

diff --git a/src/util/base64.cpp b/src/util/base64.cpp
index c75f98598137ae9511ce73186457e48f7f31869b..6e15844105de65e401af0bc8b1f6b33b2292cbe3 100644 (file)
--- a/src/util/base64.cpp
+++ b/src/util/base64.cpp
@@ -34,8 +34,9 @@ static const std::string base64_chars =
                "0123456789+/";
 
 
-static inline bool is_base64(unsigned char c) {
-       return (isalnum(c) || (c == '+') || (c == '/'));
+static inline bool is_base64(unsigned char c)
+{
+       return isalnum(c) || c == '+' || c == '/' || c == '=';
 }
 
 bool base64_is_valid(std::string const& s)