Fix a small-ish bug on left-side bevels
diff --git a/imgui_draw.cpp b/imgui_draw.cpp
index 173abd3..279fbc3 100644
--- a/imgui_draw.cpp
+++ b/imgui_draw.cpp
@@ -837,11 +837,11 @@
                 if (bevel) {
                     _IdxWritePtr[0] = (ImDrawIdx)(_VtxCurrentIdx+(miter_sign > 0 ? 1 : 2));
                     _IdxWritePtr[1] = (ImDrawIdx)(_VtxCurrentIdx+(miter_sign > 0 ? 3 : 0));
-                    _IdxWritePtr[2] = (ImDrawIdx)(_VtxCurrentIdx+5);
+                    _IdxWritePtr[2] = (ImDrawIdx)(_VtxCurrentIdx+(miter_sign > 0 ? 5 : 4));
 
                     _IdxWritePtr[3] = (ImDrawIdx)(_VtxCurrentIdx+(miter_sign > 0 ? 1 : 2));
-                    _IdxWritePtr[4] = (ImDrawIdx)(_VtxCurrentIdx+5);
-                    _IdxWritePtr[5] = (ImDrawIdx)(_VtxCurrentIdx+4);
+                    _IdxWritePtr[4] = (ImDrawIdx)(_VtxCurrentIdx+(miter_sign > 0 ? 5 : 4));
+                    _IdxWritePtr[5] = (ImDrawIdx)(_VtxCurrentIdx+(miter_sign > 0 ? 4 : 5));
                     _IdxWritePtr += 6;
                 } else {
                     unused_indices += 6;