Random misc. warning fixes and cleanups

 - Fix unused c_sand member warning in Valleys Mapgen
 - Fix some code style
 - Make some std::string params const ref

1 files changed, 2 insertions, 2 deletions

diff --git a/src/util/string.h b/src/util/string.h
index c77c5a6f9..8f4ef4711 100644
--- a/src/util/string.h
+++ b/src/util/string.h
@@ -77,8 +77,8 @@ wchar_t *narrow_to_wide_c(const char *str);
 std::wstring narrow_to_wide(const std::string &mbs);
 std::string wide_to_narrow(const std::wstring &wcs);
 
-std::string urlencode(std::string str);
-std::string urldecode(std::string str);
+std::string urlencode(const std::string &str);
+std::string urldecode(const std::string &str);
 u32 readFlagString(std::string str, const FlagDesc *flagdesc, u32 *flagmask);
 std::string writeFlagString(u32 flags, const FlagDesc *flagdesc, u32 flagmask);
 size_t mystrlcpy(char *dst, const char *src, size_t size);