fix #15117 zero size array cause incorrect codegen for VCC compiler (#21197)

fix #15117

compiler/ccgexprs.nim

@@ -3331,6 +3331,8 @@ proc genConstObjConstr(p: BProc; n: PNode; isConst: bool; result: var Rope) =
 
 proc genConstSimpleList(p: BProc, n: PNode; isConst: bool; result: var Rope) =
   result.add "{"
+  if p.vccAndC and n.len == 0 and n.typ.kind == tyArray:
+    getDefaultValue(p, n.typ[1], n.info, result)
   for i in 0..<n.len:
     let it = n[i]
     if i > 0: result.add ",\n"

tests/array/t15117.nim

@@ -0,0 +1,27 @@
+discard """
+  matrix: "--cc:vcc"
+  disabled: "linux"
+  disabled: "bsd"
+  disabled: "osx"
+  disabled: "unix"
+  disabled: "posix"
+"""
+{.experimental: "views".}
+
+let a: array[0, byte] = []
+discard a
+
+type B = object
+  a:int
+let b: array[0, B] = []
+let c: array[0, ptr B] = []
+let d: array[0, ref B] = []
+discard b
+discard c
+discard d
+
+discard default(array[0, B])
+
+type
+  View1 = openArray[byte]
+discard default(View1)