indxf: -Warray-bounds with flex. EED struct

CMakeLists.txt

@@ -119,6 +119,7 @@ endif()
 if (WCHAR_T EQUAL 2)
   set(HAVE_PCRE2_16 1)
 endif()
+
 if (NOT HAVE_MIMALLOC_OVERRIDE_H)
   if (ENABLE_MIMALLOC)
     message(WARNING "Should not ENABLE_MIMALLOC without mimalloc-override.h")

configure.ac

@@ -239,7 +239,7 @@ dnl wasm does not support -fstack-protector yet
 if test x$enable_shared = xyes -a x$ac_compiler_gnu = xyes -a x$CC != xemcc; then
   AX_COMPILER_FLAGS([WARN_CFLAGS],[AM_LDFLAGS],[$ax_is_release],
     [-fno-semantic-interposition -fwrapv -fno-common -fvisibility=hidden \
-     -fno-strict-aliasing -ftrivial-auto-var-init=zero \
+     -fno-strict-aliasing -ftrivial-auto-var-init=zero -fstrict-flex-arrays=3 \
      -fstack-protector-strong -fstack-clash-protection \
      -fcf-protection=full -fno-delete-null-pointer-checks])
 else

include/dwg.h

@@ -8079,17 +8079,17 @@ typedef struct _dwg_entity_eed_data
       BITCODE_RS length;          /* RC */
       unsigned short codepage:15; /* RS_LE */
       unsigned short is_tu:1;
-      char string[1];      /* inlined */
+      char string[];      /* inlined */
     } eed_0;
     struct { /* R2007+ 0 (1000) string */
       BITCODE_RS length;
       unsigned short _padding:15;
       unsigned short is_tu:1;
-      DWGCHAR string[1]; /* inlined */
+      DWGCHAR string[]; /* inlined */
     } eed_0_r2007;
     struct { /* 1 (1001) handle, not in data */
-      char invalid[1]; // set the eed[0].handle to the used APPID instead
       BITCODE_RS appid_index;
+      char invalid[]; // set the eed[0].handle to the used APPID instead
     } eed_1;
     struct { /* 2 (1002) "{" => 0 open, or "}" => 1 close */
       BITCODE_RC close;
@@ -8099,7 +8099,7 @@ typedef struct _dwg_entity_eed_data
     } eed_3;
     struct { /* 4 (1004) binary */
       BITCODE_RC length;
-      unsigned char data[1]; // inlined
+      unsigned char data[]; // inlined
     } eed_4;
     struct { /* 5 (1005) entity */
       BITCODE_RLL entity;