polyclipping, fix build (#8031)

dev-cpp/polyclipping/polyclipping-6.4.2.recipe

@@ -6,7 +6,7 @@ including self-intersecting polygons."
 HOMEPAGE="https://sourceforge.net/projects/polyclipping/"
 COPYRIGHT="2010-2019 Angus Johnson"
 LICENSE="Boost v1.0"
-REVISION="1"
+REVISION="2"
 SOURCE_URI="http://downloads.sourceforge.net/polyclipping/clipper_ver${portVersion}.zip"
 CHECKSUM_SHA256="a14320d82194807c4480ce59c98aa71cd4175a5156645c4e2b3edd330b930627"
 SOURCE_DIR=""
@@ -58,9 +58,8 @@ PATCH()
 BUILD()
 {
 	mkdir -p build && cd "$_"
-	cmake ../cpp \
-		-DCMAKE_INSTALL_PREFIX:PATH="$prefix" \
-		$cmakeDirArgs
+	cmake ../cpp -DCMAKE_BUILD_TYPE=Release \
+		-DCMAKE_INSTALL_PREFIX:PATH="$prefix"
 	make $jobArgs
 }