[Bug 20474] Wine can't be built with GCC in C99 mode

https://bugs.winehq.org/show_bug.cgi?id=20474

--- Comment #13 from André H.  ---
Still present in wine-1.7.29-7-g9a26f0f
FWIW:
-std=c89 doesn't compile
-std=c99 doesn't compile
-std=c11 doesn't compile
-std=gnu89 compiles, runs
-std=gnu99 compiles, runs
-std=gnu11 compiles, runs (which is good for upcoming gcc 5.0)

Tested with gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1)