* [dxgi] Fix compilation with WINE headers
```gcc
error: cannot convert 'MONITORINFOEX* {aka tagMONITORINFOEXA*}' to 'LPMONITORINFO {aka tagMONITORINFO*}' for argument '2' to 'BOOL GetMonitorInfoA(HMONITOR, LPMONITORINFO)'
```
```clang
cannot initialize a parameter of type 'LPMONITORINFO' (aka 'tagMONITORINFO *') with an rvalue of type '::MONITORINFOEX *' (aka 'tagMONITORINFOEXA *')
```
This can be WINE bug but I don't want to dig now, firs suggestion is wrong "tag":
wine variant
```c
typedef struct tagMONITORINFO
{
...
} MONITORINFO, *LPMONITORINFO;
typedef struct tagMONITORINFOEXA
{ /* the 4 first entries are the same as MONITORINFO */
...
} MONITORINFOEXA, *LPMONITORINFOEXA;
typedef struct tagMONITORINFOEXW
{ /* the 4 first entries are the same as MONITORINFO */
...
} MONITORINFOEXW, *LPMONITORINFOEXW;
DECL_WINELIB_TYPE_AW(MONITORINFOEX)
DECL_WINELIB_TYPE_AW(LPMONITORINFOEX)
```
VS
MinGW variant
```c
typedef struct tagMONITORINFO {
...
} MONITORINFO,*LPMONITORINFO;
typedef struct tagMONITORINFOEXA : public tagMONITORINFO {
CHAR szDevice[CCHDEVICENAME];
} MONITORINFOEXA,*LPMONITORINFOEXA;
typedef struct tagMONITORINFOEXW : public tagMONITORINFO {
WCHAR szDevice[CCHDEVICENAME];
} MONITORINFOEXW,*LPMONITORINFOEXW;
__MINGW_TYPEDEF_AW(MONITORINFOEX)
__MINGW_TYPEDEF_AW(LPMONITORINFOEX)
```
* [dxgi] Fix compilation with WINE headers
Use C++-style casts rather than C ones.
`limits.h` required for `UINT_MAX` and not always used, so better to use standard C++ variant from `<limits>`.
Some compilers may simply return `UINT_MAX` value, gcc version: `max() _GLIBCXX_USE_NOEXCEPT { return __INT_MAX__ * 2U + 1; }`.
* [dxgi] Replace MSVC _countof macro with std::size
pro: crosscompiler
con: may not work for older clang/gcc/...
http://en.cppreference.com/w/cpp/iterator/size
For example `Run this code` mode produces errors for GCC-5.2(C++17) and clang-3.8(C++17). Local GCC-7.3 and clang-7 versions are ok.
Not tested w/ MinGW64.
* [dxgi] Replace MSVC _countof macro with std::size
This solves issues in applications that create more than one
swap chain for a given window, and helps applications that
don't like SDL interference in general. Fullscreen support
is currently missing entirely.