(svn r16423) [0.7] -Backport from trunk:

- Fix: Do not allow content download via the console when there is no zlib as it is done for the GUI already [FS#2919] (r16420)
- Fix: Some 64bit architectures require size_t to be aligned at 8-byte boundary, ensure it for MemBlock (r16415)
- Add: [NoAI] AISignList that can be used to get a list of valid signs (r16400)
- Fix: [NewGRF] Disable multitile houses with non-zero population on additional tiles as they cause desyncs and because the specs do not allow that either (r16383)
- Fix: [NewGRF] Valid UTF-8 sequences between 0x20 and 0xFF should be allowed as is instead of being treated as control codes (r16374)
- Fix: [NewGRF] Use a valid StringID as fall-back when undefined generic NewGRF strings of vehicles are requested (r16366)

src/console_cmds.cpp

@@ -1518,6 +1518,8 @@ bool NetworkChangeCompanyPassword(byte argc, char *argv[])
 	return true;
 }
 
+/* Content downloading only is available with ZLIB */
+#if defined(WITH_ZLIB)
 #include "network/network_content.h"
 
 /** Resolve a string to a content type. */
@@ -1626,7 +1628,7 @@ DEF_CONSOLE_CMD(ConContent)
 
 	return false;
 }
-
+#endif /* defined(WITH_ZLIB) */
 #endif /* ENABLE_NETWORK */
 
 DEF_CONSOLE_CMD(ConSetting)
@@ -1773,7 +1775,11 @@ void IConsoleStdLibRegister()
 #ifdef ENABLE_NETWORK
 	/* Network hooks; only active in network */
 	IConsoleCmdHookAdd ("resetengines", ICONSOLE_HOOK_ACCESS, ConHookNoNetwork);
+
+/* Content downloading is only available with ZLIB */
+#if defined(WITH_ZLIB)
 	IConsoleCmdRegister("content",         ConContent);
+#endif /* defined(WITH_ZLIB) */
 
 	/*** Networking commands ***/
 	IConsoleCmdRegister("say",             ConSay);