Using nullptr in locations where warning disable is not convenient. (#6313, #4537)

docs/FAQ.md

@@ -604,7 +604,7 @@ ImFontConfig config;
 config.MergeMode = true;
 io.Fonts->AddFontDefault();
 io.Fonts->AddFontFromFileTTF("fontawesome-webfont.ttf", 16.0f, &config, ranges); // Merge icon font
-io.Fonts->AddFontFromFileTTF("myfontfile.ttf", size_pixels, NULL, &config, io.Fonts->GetGlyphRangesJapanese()); // Merge japanese glyphs
+io.Fonts->AddFontFromFileTTF("myfontfile.ttf", size_pixels, nullptr, &config, io.Fonts->GetGlyphRangesJapanese()); // Merge japanese glyphs
 ```
 
 ##### [Return to Index](#index)
@@ -616,7 +616,7 @@ When loading a font, pass custom Unicode ranges to specify the glyphs to load.
 
 ```cpp
 // Add default Japanese ranges
-io.Fonts->AddFontFromFileTTF("myfontfile.ttf", size_in_pixels, NULL, io.Fonts->GetGlyphRangesJapanese());
+io.Fonts->AddFontFromFileTTF("myfontfile.ttf", size_in_pixels, nullptr, io.Fonts->GetGlyphRangesJapanese());
 
 // Or create your own custom ranges (e.g. for a game you can feed your entire game script and only build the characters the game need)
 ImVector<ImWchar> ranges;
@@ -625,7 +625,7 @@ builder.AddText("Hello world");                        // Add a string (here "He
 builder.AddChar(0x7262);                               // Add a specific character
 builder.AddRanges(io.Fonts->GetGlyphRangesJapanese()); // Add one of the default ranges
 builder.BuildRanges(&ranges);                          // Build the final result (ordered ranges with all the unique characters submitted)
-io.Fonts->AddFontFromFileTTF("myfontfile.ttf", 16.0f, NULL, ranges.Data);
+io.Fonts->AddFontFromFileTTF("myfontfile.ttf", 16.0f, nullptr, ranges.Data);
 ```
 
 All your strings need to use UTF-8 encoding. In C++11 you can encode a string literal in UTF-8