libcamera: proxy: linux: Initialise pointer members at construction time

If the IPAProxyLinux constructor fails to locate the proxy worker, the
socket_ and proc_ member pointers will be left uninitialised, leading
the a crash in the destructor. Initialise them both to nullptr.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>

src/libcamera/proxy/ipa_proxy_linux.cpp

@@ -44,6 +44,7 @@ int IPAProxyLinux::init()
 }
 
 IPAProxyLinux::IPAProxyLinux(IPAModule *ipam)
+	: proc_(nullptr), socket_(nullptr)
 {
 	LOG(IPAProxy, Debug)
 		<< "initializing dummy proxy: loading IPA from "