Fix unitialized buffer (#403)

Author: lemire

src/unicode.cpp

@@ -59,7 +59,7 @@ ada_really_inline bool has_tabs_or_newline(
                        vceqq_u8(word, mask3));
   }
   if (i < user_input.size()) {
-    uint8_t buffer[16];
+    uint8_t buffer[16]{};
     memcpy(buffer, user_input.data() + i, user_input.size() - i);
     uint8x16_t word = vld1q_u8((const uint8_t*)user_input.data() + i);
     running = vorrq_u8(vorrq_u8(running, vorrq_u8(vceqq_u8(word, mask1),
@@ -84,7 +84,7 @@ ada_really_inline bool has_tabs_or_newline(
         _mm_cmpeq_epi8(word, mask3));
   }
   if (i < user_input.size()) {
-    uint8_t buffer[16];
+    uint8_t buffer[16]{};
     memcpy(buffer, user_input.data() + i, user_input.size() - i);
     __m128i word = _mm_loadu_si128((const __m128i*)buffer);
     running = _mm_or_si128(