using intmax for adapter default instead of -1

Author: smasherprog

include/ScreenCapture.h

@@ -27,7 +27,7 @@ namespace Screen_Capture {
     struct Monitor {
         int Id = INT32_MAX;
         int Index = INT32_MAX;
-        int Adapter = -1;
+        int Adapter = INT32_MAX;
         int Height = 0;
         int Width = 0;
         // Offsets are the number of pixels that a monitor can be from the origin. For example, users can shuffle their