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The AngleArc() function that was being used to draw circles on Windows turns
out to be unsupported on the Win9x/Me series. Use Arc() instead (tested on
Win98 and Win2K).

[originally from svn r6012]

--- a/windows.c

+++ b/windows.c

@@ -342,10 +342,11 @@

 	SelectObject(fe->hdc_bm, oldpen);

     } else {

 	HPEN oldpen = SelectObject(fe->hdc_bm, fe->pens[colour]);

-	MoveToEx(fe->hdc_bm, cx + radius, cy, NULL);

-	AngleArc(fe->hdc_bm, cx, cy, radius, 0.0F, 360.0F);

+        Arc(fe->hdc_bm, cx - radius, cy - radius,

+            cx + radius + 1, cy + radius + 1,

+            cx - radius, cy, cx - radius, cy);

 	SelectObject(fe->hdc_bm, oldpen);

-    }    

+    }

 }

 void draw_polygon(frontend *fe, int *coords, int npoints,