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r3161 | terminx | 2012-11-14 17:30:31 -0800 (Wed, 14 Nov 2012) | 2 lines

MinGW C build fix

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r3160 | terminx | 2012-11-14 16:23:10 -0800 (Wed, 14 Nov 2012) | 2 lines

Add a couple of #ifdef __cplusplus I missed

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r3159 | terminx | 2012-11-14 15:32:43 -0800 (Wed, 14 Nov 2012) | 4 lines

Fix the warnings when building with C++, add MSVC C++ build support. This also changes the internal type of lotags, hitags and cstat type fields to uint16_t instead of int16_t to clean up some dubious behavior wherein the code was using a value of 32768 as a flag in these fields for certain types of things, like invisible sprites (using the value as if it was uint16_t) where it was elsewhere checking if the value was < 0 (using the value as if it was int16_t). This change may break a few specific effects if any part of the relevant code was missed when looking for areas that needed to be addressed.

I think there's also a fix for the CON precache system breakage in here (lost it in my local tree when I started getting the C++ build working in MSVC, sorry!)

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