[PATCH] Fix C++14 Compatibility needed for GCC6

[susnux]

GCC6 defaults to C++14, so compiling with it will produce some errors. (I use openSUSE Tumbleweed with GCC6).

The fix is quite simple and a patch is attached, the problem with 0ad is that there are functions with pointer as return value which return "false", that worked for c++ <= 2003 because false evaluates to 0 which is a valid pointer. But for C++ >= 2011 false will not evaluate to 0.

[susnux]

Patch: Fix compatibility with c++14 needed for gcc6

[susnux]

Forgot to mention: I use Alpha 20 of 0AD.

[elexis]

Thanks for your notification and the patch, that is always welcome! The bug you mentioned was reported and fixed in #3967 (unfortunately after the last release).