Make windows headers lower-case to support MXE-builds

oxygine/src/oxygine/actor/DebugActor.cpp

@@ -33,7 +33,7 @@
 #elif _WIN32
 #pragma comment(lib, "psapi.lib") // Added to support GetProcessMemoryInfo()
 #include <windows.h>
-#include <Psapi.h>
+#include <psapi.h>
 #endif
 
 

oxygine/src/oxygine/core/STDFileSystem.cpp

@@ -19,7 +19,7 @@
 #elif OXYGINE_SDL && !OXYGINE_FILESYSTEM_USE_STDIO
 #ifdef _WIN32
 #include <direct.h>
-#include <Windows.h>
+#include <windows.h>
 #endif
 
 #include <sys/stat.h>

oxygine/src/oxygine/core/log.cpp

@@ -12,7 +12,7 @@
 
 #else
 #ifdef _WIN32
-#include <Windows.h>
+#include <windows.h>
 #define LOGD(str) fputs(str, stdout); OutputDebugStringA(str);
 #else
 #define LOGD(str) fputs(str, stdout)
@@ -188,4 +188,4 @@ namespace oxygine
             out_line_prefix(0, tm, format, args);
         }
     }
-}
+}