(svn r19875) [1.0] -Backport from trunk:

- Fix: NetBSD compilation was still broken in some cases [FS#3845] (r19874, r19859)
- Fix: If the (guessed initial) destination tile of a road vehicle was not a road stop but was a T-junction or turn, the road vehicles would jump around in circles [FS#3817] (r19873)
- Fix: When a network connection gets lost and a game with AIs was loaded the client might crash due to the AIs not being loaded while the game loop is executed [FS#3819] (r19869)
- Fix: Use non-breaking spaces for currency pre-/postfixes (r19867)
- Fix: Crash when changing/viewing locale settings in the console [FS#3830] (r19865, r19864, r19863, r19862)

src/string.cpp

@@ -397,7 +397,7 @@ size_t Utf8TrimString(char *s, size_t maxlen)
 	return length;
 }
 
-#ifndef _GNU_SOURCE
+#ifdef DEFINE_STRNDUP
 #include "core/math_func.hpp"
 char *strndup(const char *s, size_t len)
 {
@@ -406,7 +406,7 @@ char *strndup(const char *s, size_t len)
 	memcpy(tmp, s, len);
 	return tmp;
 }
-#endif /* !_GNU_SOURCE */
+#endif /* DEFINE_STRNDUP */
 
 #ifdef DEFINE_STRCASESTR
 char *strcasestr(const char *haystack, const char *needle)