Avoid compilation warnings on MS-Windows

* src/w32term.c (w32_read_socket): Avoid compiler warnings about
parentheses around assignment.
* src/w32fns.c (w32_createwindow): Remove unused variable
dwStyle.  Use "|=" where appropriate.

2 files changed, 8 insertions, 10 deletions

diff --git a/src/w32fns.c b/src/w32fns.c
index 62798f269ef..8dca03265b7 100644
--- a/src/w32fns.c
+++ b/src/w32fns.c
@@ -2297,7 +2297,6 @@ w32_createwindow (struct frame *f, int *coords)
 {
   HWND hwnd = NULL, parent_hwnd = NULL;
   RECT rect;
-  DWORD dwStyle;
   int top, left;
   Lisp_Object border_width = Fcdr (Fassq (Qborder_width, f->param_alist));
 
@@ -2310,14 +2309,13 @@ w32_createwindow (struct frame *f, int *coords)
         {
           /* If we want a thin border, specify it here.  */
           if (NUMBERP (border_width) && (XINT (border_width) > 0))
-            f->output_data.w32->dwStyle =
-              f->output_data.w32->dwStyle | WS_BORDER;
+            f->output_data.w32->dwStyle |= WS_BORDER;
         }
       else
         /* To decorate a child frame, list all needed elements.  */
-        f->output_data.w32->dwStyle =
-          f->output_data.w32->dwStyle | WS_THICKFRAME | WS_CAPTION
-          | WS_MAXIMIZEBOX | WS_MINIMIZEBOX | WS_SYSMENU;
+        f->output_data.w32->dwStyle |= (WS_THICKFRAME | WS_CAPTION
+                                        | WS_MAXIMIZEBOX | WS_MINIMIZEBOX
+                                        | WS_SYSMENU);
     }
   else if (FRAME_UNDECORATED (f))
     {
@@ -2327,14 +2325,13 @@ w32_createwindow (struct frame *f, int *coords)
 
       /* If we want a thin border, specify it here.  */
       if (NUMBERP (border_width) && (XINT (border_width) > 0))
-        f->output_data.w32->dwStyle =
-          f->output_data.w32->dwStyle | WS_BORDER;
+        f->output_data.w32->dwStyle |= WS_BORDER;
     }
   else
     f->output_data.w32->dwStyle = WS_OVERLAPPEDWINDOW;
 
   /* Always clip children.  */
-  f->output_data.w32->dwStyle = f->output_data.w32->dwStyle | WS_CLIPCHILDREN;
+  f->output_data.w32->dwStyle |= WS_CLIPCHILDREN;
 
   rect.left = rect.top = 0;
   rect.right = FRAME_PIXEL_WIDTH (f);
diff --git a/src/w32term.c b/src/w32term.c
index 1c3d243b62c..36dc6364ae3 100644
--- a/src/w32term.c
+++ b/src/w32term.c
@@ -5136,7 +5136,8 @@ w32_read_socket (struct terminal *terminal,
             }
 #endif
 
-          if (f = x_window_to_frame (dpyinfo, msg.msg.hwnd))
+          f = x_window_to_frame (dpyinfo, msg.msg.hwnd);
+          if (f)
             x_clear_under_internal_border (f);
 
           check_visibility = 1;