libcamera: stream: Initialise pixelFormat in StreamConfiguration()

To avoid depending on unitialised values, set the pixelFormat field of
the StreamConfiguration class to 0 in the constructor.

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

src/libcamera/stream.cpp

@@ -289,7 +289,7 @@ SizeRange StreamFormats::range(unsigned int pixelformat) const
  * handlers provied StreamFormats.
  */
 StreamConfiguration::StreamConfiguration()
-	: memoryType(InternalMemory), stream_(nullptr)
+	: pixelFormat(0), memoryType(InternalMemory), stream_(nullptr)
 {
 }
 
@@ -297,7 +297,8 @@ StreamConfiguration::StreamConfiguration()
  * \brief Construct a configuration with stream formats
  */
 StreamConfiguration::StreamConfiguration(const StreamFormats &formats)
-	: memoryType(InternalMemory), stream_(nullptr), formats_(formats)
+	: pixelFormat(0), memoryType(InternalMemory), stream_(nullptr),
+	  formats_(formats)
 {
 }