bugfix: fixed bugs suspected by cppcheck: shift signed 32-bit value by 31 bits and uninitialized variable. (#76)

[dtoa.c:2453] -> [dtoa.c:2454]: (warning) Shifting signed 32-bit value by 31 bits is undefined behaviour. See condition at line 2453.
[dtoa.c:2846]: (error) Uninitialized variable: bb
[dtoa.c:2847]: (error) Uninitialized variable: bd
[dtoa.c:2848]: (error) Uninitialized variable: bs
[dtoa.c:2850]: (error) Uninitialized variable: delta

1 files changed, 7 insertions, 3 deletions

diff --git a/dtoa.c b/dtoa.c
index 56398ba..4067e5b 100644
--- a/dtoa.c
+++ b/dtoa.c
@@ -2451,10 +2451,10 @@ retlow1:
                 if ((j = ((word0(rv) & Exp_mask) >> Exp_shift) - bc->scale) <= 0) {
                         i = 1 - j;
                         if (i <= 31) {
-                                if (word1(rv) & (0x1 << i))
+                                if (word1(rv) & (0x1U << i))
                                         goto odd;
                                 }
-                        else if (word0(rv) & (0x1 << (i-32)))
+                        else if (word0(rv) & (0x1U << (i-32)))
                                 goto odd;
                         }
                 else if (word1(rv) & 1) {
@@ -2488,7 +2488,11 @@ fpconv_strtod
         U aadj2, adj, rv, rv0;
         ULong y, z;
         BCinfo bc;
-        Bigint *bb, *bb1, *bd, *bd0, *bs, *delta;
+        Bigint *bb1, *bd0;
+        Bigint *bb = NULL;
+        Bigint *bd = NULL;
+        Bigint *bs = NULL;
+        Bigint *delta = NULL;
 #ifdef Avoid_Underflow
         ULong Lsb, Lsb1;
 #endif