suppress uninitialized variable warnings

Starting GCC 7, warnings about uninitialized variables are issued around
them.  Such warnings could be false positives (all versions of clang do
not warn), but adding initializers there could never be bad things.

2 files changed, 2 insertions, 2 deletions

diff --git a/bignum.c b/bignum.c
index e9bb5780b5..07b7cb2101 100644
--- a/bignum.c
+++ b/bignum.c
@@ -3409,7 +3409,7 @@ rb_absint_numwords(VALUE val, size_t word_numbits, size_t *nlz_bits_ret)
     size_t numbytes;
     int nlz_bits_in_msbyte;
     size_t numwords;
-    size_t nlz_bits;
+    size_t nlz_bits = 0;
 
     if (word_numbits == 0)
         return (size_t)-1;
diff --git a/vm_method.c b/vm_method.c
index 1bcec9bc5f..d1afb88e40 100644
--- a/vm_method.c
+++ b/vm_method.c
@@ -894,7 +894,7 @@ rb_method_entry_at(VALUE klass, ID id)
 static inline rb_method_entry_t*
 search_method(VALUE klass, ID id, VALUE *defined_class_ptr)
 {
-    rb_method_entry_t *me;
+    rb_method_entry_t *me = NULL;
 
     RB_DEBUG_COUNTER_INC(mc_search);