re PR target/78849 (ICE on initialization of global struct containing __int20 array at varasm.c:4968)

	PR target/78849
	* gcc/tree.c (build_common_tree_nodes): Dont set TYPE_SIZE for __intN
	types.

	PR target/78849
	* gcc.target/msp430/msp430.exp: Remove -pedantic-errors from
	DEFAULT_CFLAGS.
	* gcc.target/msp430/pr78849.c: New test.

From-SVN: r260627