tccgen.c: Fix flex array members some more

Last fix didn't work for function f1int in the added testcase.

tests/tests2/80_flexarray.c

@@ -0,0 +1,25 @@
+#include <stdio.h>
+struct wchar {
+    char *data; char mem[];
+};
+struct wint {
+    char *data; int mem[];
+};
+int f1char (void) {
+    char s[9]="nonono";
+    struct wchar q = {"bugs"};
+    return !s[0];
+}
+int f1int (void) {
+    char s[9]="nonono";
+    struct wint q = {"bugs"};
+    return !s[0];
+}
+int main (void) {
+   char s[9]="nonono";
+   static struct wchar q = {"bugs", {'c'}};
+   //printf ("tcc has %s %s\n", s, q.data);
+   if (f1char() || f1int())
+     printf ("bla\n");
+   return !s[0];
+}