tools:iio:iio_utils: refactor assignment of is_signed

Change the assignment of *is_signed in iioutils_get_type() to a one-liner,
as already done with *be.
Signed-off-by: Hartmut Knaack <knaack.h@gmx.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

tools/iio/iio_utils.c

@@ -168,10 +168,7 @@ int iioutils_get_type(unsigned *is_signed,
 				*mask = ~0;
 			else
 				*mask = (1 << *bits_used) - 1;
-			if (signchar == 's')
-				*is_signed = 1;
-			else
-				*is_signed = 0;
+			*is_signed = (signchar == 's');
 			if (fclose(sysfsfp)) {
 				ret = -errno;
 				printf("Failed to close %s\n", filename);