Add patch to fix wxWidgets 3.0.2 mirrored print bug.

patches/wxWidgets-3.0.2-msw-dc-orientation-fix.patch

@@ -0,0 +1,13 @@
+diff --git a/src/msw/dc.cpp b/src/msw/dc.cpp
+index abd8956..d9168af 100644
+--- a/src/msw/dc.cpp
++++ b/src/msw/dc.cpp
+@@ -2007,7 +2007,7 @@ void wxMSWDCImpl::RealizeScaleAndOrigin()
+     // Becaue only devExtX/logExtX ratio and devExtY/logExtY ratio are counted
+     // we can reduce the fractions to avoid large absolute numbers
+     // and possible arithmetic overflows.
+-    unsigned int gcd = CalcGCD(abs(devExtX), abs(logExtX));
++    int gcd = CalcGCD(abs(devExtX), abs(logExtX));
+     devExtX /= gcd;
+     logExtX /= gcd;
+     gcd = CalcGCD(abs(devExtY), abs(logExtY));