Revert "Convert (void) to static_cast<void> in C++ code"

This reverts commit 80c6ab7b99bcbd7b940f78dc0cac52c30249f59c.

Reason for revert: (void) idiom is prevalent through out C++ code.

Original change's description:
> Convert (void) to static_cast<void> in C++ code
> 
> Converting instances of old C-style void casts to suppress return
> values to use C++ style static cases. There are a few examples of
> (void) that remain, since they are in C code, and the third_party/
> instances are not touched at all.
> 
> Change-Id: I72b3fc0e1d713db669b76135e03d1cf87873a2fe
> Reviewed-on: https://pdfium-review.googlesource.com/33790
> Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
> Commit-Queue: Ryan Harrison <rharrison@chromium.org>

TBR=thestig@chromium.org,tsepez@chromium.org,dsinclair@chromium.org,hnakashima@chromium.org,rharrison@chromium.org

Change-Id: Ib6cc021c97cb1ea7c71b90346fa9b500659f565d
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://pdfium-review.googlesource.com/33890
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/fpdfsdk/fpdf_formfill.cpp b/fpdfsdk/fpdf_formfill.cpp
index 8ebf7faaff..62d2c00d55 100644
--- a/fpdfsdk/fpdf_formfill.cpp
+++ b/fpdfsdk/fpdf_formfill.cpp
@@ -272,9 +272,9 @@ FPDFPage_FormFieldZOrderAtPoint(FPDF_FORMHANDLE hHandle,
     return -1;
   CPDF_InterForm interform(pPage->GetDocument());
   int z_order = -1;
-  static_cast<void>(interform.GetControlAtPoint(
+  (void)interform.GetControlAtPoint(
       pPage, CFX_PointF(static_cast<float>(page_x), static_cast<float>(page_y)),
-      &z_order));
+      &z_order);
   return z_order;
 }