Fatal error C1001 (Internal compiler error) when compiling with VS 2017

[EwoutH]

When updating the AppVeyor configuration an error popped up in the compile log:

C:\projects\alicevision\src\aliceVision/prettyprint.hpp(62): fatal error C1001: An internal error has occurred in the compiler. [C:\projects\alicevision\build\src\aliceVision\system\aliceVision_system.vcxproj]
  (compiler file 'd:\agent\_work\8\s\src\vctools\compiler\cxxfe\sl\p1\c\types.c', line 4563)
   To work around this problem, try simplifying or changing the program near the locations listed above.

Here the AppVeyor configuration used and the run itself.

Blocks #775.

[EwoutH]

@simogasp Thanks a lot, I rebased #775, let's see how it goes!