Fix an uninitialized value warning in APFloat.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79353 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/APFloat.cpp b/lib/Support/APFloat.cpp
index d8d492c..d15a21b 100644
--- a/lib/Support/APFloat.cpp
+++ b/lib/Support/APFloat.cpp
@@ -2132,7 +2132,7 @@
 APFloat::convertFromHexadecimalString(const StringRef &s,
                                       roundingMode rounding_mode)
 {
-  lostFraction lost_fraction;
+  lostFraction lost_fraction = lfExactlyZero;
   integerPart *significand;
   unsigned int bitPos, partsCount;
   StringRef::iterator dot, firstSignificantDigit;
@@ -2159,7 +2159,6 @@
 
     hex_value = hexDigitValue(*p);
     if(hex_value == -1U) {
-      lost_fraction = lfExactlyZero;
       break;
     }