don't crash when calling EnumNameXXX on sparse enum (#4982)

Make an out-of-bounds check for enum values before using them to index the
names array.  For consistency with non-sparse enums an empty string is
returned.

Fixes #4821

1 files changed, 2 insertions, 0 deletions

diff --git a/samples/monster_generated.h b/samples/monster_generated.h
index 07fbd3a4..4fbbeccc 100644
--- a/samples/monster_generated.h
+++ b/samples/monster_generated.h
@@ -55,6 +55,7 @@ inline const char * const *EnumNamesColor() {
 }
 
 inline const char *EnumNameColor(Color e) {
+  if (e < Color_Red || e > Color_Blue) return "";
   const size_t index = static_cast<int>(e);
   return EnumNamesColor()[index];
 }
@@ -84,6 +85,7 @@ inline const char * const *EnumNamesEquipment() {
 }
 
 inline const char *EnumNameEquipment(Equipment e) {
+  if (e < Equipment_NONE || e > Equipment_Weapon) return "";
   const size_t index = static_cast<int>(e);
   return EnumNamesEquipment()[index];
 }