Stop GCC 8.3 warning about possible buffer overrun when generating a dictionary.

In practice this would never occur as it requires making a Peta-byte sized string to trigger the error.

Author: tsyrogit

.gitignore

@@ -24,5 +24,6 @@ zxcvbn.dict
 test-*file
 test-*line
 test-*lib
+test-internals
 dictgen
 dict-*.h

dict-generate.cpp

@@ -889,7 +889,7 @@ void CreateArrays(NodeSPtr Root, StringIntSet_t & StrSet, StringOfInts & ChildAd
     }
     if (x >= (1 << BITS_CHILD_MAP_INDEX))
     {
-        char Tmp[20];
+        char Tmp[24];
         snprintf(Tmp, sizeof Tmp, "%lu", x);
         throw string("Not enough bits for child map index value of ") + Tmp + " for " +
                 Its->s + " (BITS_CHILD_MAP_INDEX too small)";