[C] Add blank line after length check block.

Author: denizevrenci

sbe-tool/src/main/java/uk/co/real_logic/sbe/generation/c/CGenerator.java

@@ -1595,7 +1595,8 @@ private CharSequence generateArrayProperty(
             "    {\n" +
             "        errno = E105;\n" +
             "        return NULL;\n" +
-            "    }\n" +
+            "    }\n\n" +
+
             "%5$s\n" +
             "    return codec;\n" +
             "}\n",