Cygwin: testautomation run-time fix

[sdl-ci-filter cygwin]
[sdl-ci-filter msys2-*]

src/stdlib/SDL_getenv.c

@@ -22,7 +22,7 @@
 
 #include "SDL_getenv_c.h"
 
-#if defined(SDL_PLATFORM_WINDOWS)
+#if defined(SDL_PLATFORM_WINDOWS) && !defined(SDL_PLATFORM_CYGWIN)
 #include "../core/windows/SDL_windows.h"
 #endif
 
@@ -30,7 +30,7 @@
 #include "../core/android/SDL_android.h"
 #endif
 
-#if defined(SDL_PLATFORM_WINDOWS)
+#if defined(SDL_PLATFORM_WINDOWS) && !defined(SDL_PLATFORM_CYGWIN)
 #define HAVE_WIN32_ENVIRONMENT
 #elif defined(HAVE_GETENV) && \
       (defined(HAVE_SETENV) || defined(HAVE_PUTENV)) && \
@@ -103,7 +103,7 @@ SDL_Environment *SDL_CreateEnvironment(bool populated)
     env->lock = SDL_CreateMutex();
 
     if (populated) {
-#ifdef SDL_PLATFORM_WINDOWS
+#if defined(SDL_PLATFORM_WINDOWS) && !defined(SDL_PLATFORM_CYGWIN)
         LPWCH strings = GetEnvironmentStringsW();
         if (strings) {
             for (LPWCH string = strings; *string; string += SDL_wcslen(string) + 1) {
@@ -146,7 +146,7 @@ SDL_Environment *SDL_CreateEnvironment(bool populated)
                 SDL_InsertIntoHashTable(env->strings, variable, value, true);
             }
         }
-#endif // SDL_PLATFORM_WINDOWS
+#endif // SDL_PLATFORM_WINDOWS && !SDL_PLATFORM_CYGWIN
     }
 
     return env;