Recent Commits to cava:master

CI: Add Windows build with mingw toolchain

Fix Ctrl-c handler function for Windows

This fixes the following compiler error with mingw compiler.

cava/cava.c:258:32: error:
passing argument 1 of 'SetConsoleCtrlHandler' from incompatible pointer type [-Wincompatible-pointer-types]
258 |     if (!SetConsoleCtrlHandler(sig_handler, TRUE)) {
    |                                ^~~~~~~~~~~
    |                                |
    |                                void (*)(int)

Use proper printf function with stderr

This fixes the following compiler error with mingw compiler.

cava/output/sdl_glsl.c:89:16: error:
passing argument 1 of 'printf' from incompatible pointer type [-Wincompatible-pointer-types]
89 |         printf(stderr, "Error initializing GLEW! %s\n", glewGetErrorString(glewError));
   |                ^~~~~~
   |                |
   |                FILE * {aka struct _iobuf *}

Fix relative include directory for header files

This fixes compiler errors as following with cmake and mingw compiler.

cava/output/sdl_glsl.c:9:10: fatal error: output/sdl_glsl.h: No such file or directory
 9 | #include "output/sdl_glsl.h"
   |          ^~~~~~~~~~~~~~~~~~~
compilation terminated.

Fix preprocessor for checking Windows

_MSC_VER is defined in MSVC toolchain only whereas _WIN32 is defined for all toolchain targeting Windows.
See https://learn.microsoft.com/en-us/cpp/preprocessor/predefined-macros

CMake: Add condition for targeting Windows