Pushing boolean value to univalue correctly

Author: karelbilek

include/univalue.h

@@ -130,6 +130,10 @@ class UniValue {
         UniValue tmpVal(val_);
         return pushKV(key, tmpVal);
     }
+    bool pushKV(const std::string& key, bool val_) {
+        UniValue tmpVal((bool)val_);
+        return pushKV(key, tmpVal);
+    }
     bool pushKV(const std::string& key, int val_) {
         UniValue tmpVal((int64_t)val_);
         return pushKV(key, tmpVal);