wcc: structlit repeat-fill dim off the stamped tinfo (rule 13)

cgstructlitfill's `...` total read only an N_INTLIT dim node, so a
def-dimensioned [N]T struct field under-filled: elements 1..N-1 kept
the zero-fill, silently, wwstage only (cstage and the tn twin read
the stamped array length). Read tichase(fi.tnode.type_).alen first;
the surface node stays as the fallback for unstamped shapes.

internal/wwfixture/types.ww

@@ -1,13 +1,13 @@
 package wwfixture;
 
 def protocolversion: i32 = 1;
-def corpuscount: i32 = 1749;
+def corpuscount: i32 = 1750;
 def errorcount: i32 = 349;
 def compilecount: i32 = 21;
 def runcount: i32 = 209;
-def runexitcount: i32 = 1170;
-def nativecount: i32 = 3498;
-def corpushash: str = "616b3e7f4fca31cb99409c58a29ac73623c997967ddd57651a1370c2c2e2be6a";
+def runexitcount: i32 = 1171;
+def nativecount: i32 = 3500;
+def corpushash: str = "d52fa0df91c89bf51bca70045a2dbf39d5012ac03bf687e231240dc1c5b3fc53";
 
 type directive = enum i32 {
 	ERROR = 0,