fix: bit shifting for 64bit bridge port mask

[gregnr]

Problem

During bridge input processing, there is conditional logic to check if the bridge interface itself should receive the packet (ie. forward to CPU). The existing bitwise logic fails when BRIDGEIF_MAX_PORTS >= 32 because the literal 1 is implicitly a 32-bit integer. When shifting this value by BRIDGEIF_MAX_PORTS bits (which can be up to 63), it triggers undefined behaviour due to the shift count exceeding the width of the type.

Fix

Explicitly cast 1 to bridgeif_portmask_t to ensure that the shift operation is performed on a 64-bit value when necessary. This works because when BRIDGEIF_MAX_PORTS >= 32, bridgeif_portmask_t is defined as a u64_t type:

lwip/src/include/netif/bridgeif.h

Lines 51 to 61 in 554e104

	#if (BRIDGEIF_MAX_PORTS < 0) || (BRIDGEIF_MAX_PORTS >= 64)
	#error BRIDGEIF_MAX_PORTS must be [1..63]
	#elif BRIDGEIF_MAX_PORTS < 8
	typedef u8_t bridgeif_portmask_t;
	#elif BRIDGEIF_MAX_PORTS < 16
	typedef u16_t bridgeif_portmask_t;
	#elif BRIDGEIF_MAX_PORTS < 32
	typedef u32_t bridgeif_portmask_t;
	#elif BRIDGEIF_MAX_PORTS < 64
	typedef u64_t bridgeif_portmask_t;
	#endif