Fix rectangle width and height check to account for squares (#4382)

src/rshapes.c

@@ -828,8 +828,8 @@ void DrawRectangleLinesEx(Rectangle rec, float lineThick, Color color)
 {
     if ((lineThick > rec.width) || (lineThick > rec.height))
     {
-        if (rec.width > rec.height) lineThick = rec.height/2;
-        else if (rec.width < rec.height) lineThick = rec.width/2;
+        if (rec.width >= rec.height) lineThick = rec.height/2;
+        else if (rec.width <= rec.height) lineThick = rec.width/2;
     }
 
     // When rec = { x, y, 8.0f, 6.0f } and lineThick = 2, the following