Fix libc++ test to pass in C++03 mode

Was hitting: "error: scalar initializer cannot be empty"

llvm-svn: 296889
diff --git a/libcxx/test/std/depr/depr.c.headers/stdio_h.pass.cpp b/libcxx/test/std/depr/depr.c.headers/stdio_h.pass.cpp
index 8670af6..36c37a3 100644
--- a/libcxx/test/std/depr/depr.c.headers/stdio_h.pass.cpp
+++ b/libcxx/test/std/depr/depr.c.headers/stdio_h.pass.cpp
@@ -107,7 +107,7 @@
 int main()
 {
     FILE* fp = 0;
-    fpos_t fpos = {};
+    fpos_t fpos = fpos_t();
     size_t s = 0;
     char* cp = 0;
     char arr[] = {'a', 'b'};