libstdc++: Remove redundant cast in floating_from_chars.cc

In r15-7647-g32457bc25fea80 I added a cast and also changed the type of
the variable, making the cast redundant. This removes the cast.

libstdc++-v3/ChangeLog:

	* src/c++17/floating_from_chars.cc (__floating_from_chars_hex):
	Remove redundant cast.

diff --git a/libstdc++-v3/src/c++17/floating_from_chars.cc b/libstdc++-v3/src/c++17/floating_from_chars.cc
index d48f1c0d45453e5ddda333ed6b3de454f7689c64..9bad12c7f69ecd5ce1275e05484d3e96dd492867 100644 (file)
--- a/libstdc++-v3/src/c++17/floating_from_chars.cc
+++ b/libstdc++-v3/src/c++17/floating_from_chars.cc
@@ -1103,8 +1103,7 @@ namespace
        // If the leading hexit is not '1', shift MANTISSA to make it so.
        // This normalizes input like "4.08p0" into "1.02p2".
        const unsigned leading_hexit = mantissa >> mantissa_bits;
-       const int leading_hexit_width
-         = __bit_width((unsigned)leading_hexit); // FIXME: optimize?
+       const int leading_hexit_width = __bit_width(leading_hexit); // FIXME: optimize?
        __glibcxx_assert(leading_hexit_width >= 1 && leading_hexit_width <= 4);
        shift_mantissa(leading_hexit_width - 1);
        // After this adjustment, we can assume the leading hexit is '1'.