[PATCH] [PATCH] Avoid integer overflow in gcc.dg/cpp/charconst-3.c (PR testsuite...

[PATCH] [PATCH] Avoid integer overflow in gcc.dg/cpp/charconst-3.c (PR testsuite/116806)

The intermediate expression (unsigned char) '\234' * scale overflows
int on int16 targets, causing the test case to fail there.  Fixed by
performing the arithmetic in unsigned type, as suggested by Andrew Pinski.

Regression tested on x86_64-pc-linux-gnu, and on an out-of-tree 16-bit
target with simulator.  Manually checked the generated code for pdp11
and xstormy16.

Ok for trunk? (I don't have commit rights so I'd need help committing it.)

gcc/testsuite/

	PR testsuite/116806
	* gcc.dg/cpp/charconst-3.c: Perform arithmetic in unsigned
	type to avoid integer overflow.