riched20: Add missing void to parameter list.

dlls/riched20/tests/editor.c

@@ -875,7 +875,7 @@ static void test_EM_SETUNDOLIMIT(void)
   DestroyWindow(hwndRichEdit);
 }
 
-static void test_ES_PASSWORD()
+static void test_ES_PASSWORD(void)
 {
   /* This isn't hugely testable, so we're just going to run it through it's paces. */
 
@@ -901,7 +901,7 @@ static void test_ES_PASSWORD()
   DestroyWindow(hwndRichEdit);
 }
 
-static void test_EM_SETTEXTEX()
+static void test_EM_SETTEXTEX(void)
 {
   HWND hwndRichEdit = new_richedit(NULL);
   SETTEXTEX setText;
@@ -1064,7 +1064,7 @@ static void test_EM_GETLIMITTEXT(void)
   DestroyWindow(hwndRichEdit);
 }
 
-static void test_WM_SETFONT()
+static void test_WM_SETFONT(void)
 {
   /* There is no invalid input or error conditions for this function.
    * NULL wParam and lParam just fall back to their default values