libcamera: pipeline: simple: Use std::make_tuple()

Prior to N4387 ([1]), the std::tuple::tuple(const Types&...) constructor
was unconditionally explicit. gcc 5 doesn't implement N4387, leading to
a compilation error in the simple pipeline handler. Use
std::make_tuple() to fix it.

[1] http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4387.html

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>

src/libcamera/pipeline/simple/converter.cpp

@@ -271,9 +271,9 @@ SimpleConverter::strideAndFrameSize(const Size &size,
 
 	int ret = m2m_->capture()->tryFormat(&format);
 	if (ret < 0)
-		return { 0, 0 };
+		return std::make_tuple(0, 0);
 
-	return { format.planes[0].bpl, format.planes[0].size };
+	return std::make_tuple(format.planes[0].bpl, format.planes[0].size);
 }
 
 } /* namespace libcamera */