Conditionally compile the SASL code only with botan and database

src/utils/base64.cpp

@@ -2,18 +2,15 @@
 
 #ifdef BOTAN_FOUND
 #include <botan/base64.h>
-#endif
 
 namespace base64
 {
 
 std::string encode(const std::string &input)
 {
-#ifdef BOTAN_FOUND
   return Botan::base64_encode(reinterpret_cast<const uint8_t*>(input.data()), input.size());
-#else
-#error "base64::encode() not yet implemented without Botan."
-#endif
 }
 
 }
+
+#endif

src/utils/base64.hpp

@@ -2,9 +2,13 @@
 
 #include "biboumi.h"
 
+#ifdef BOTAN_FOUND
+
 #include <string>
 
 namespace base64
 {
 std::string encode(const std::string& input);
 }
+
+#endif