[LyX/master] Remove unnecessary `c_str`

[Yuriy Skalko]

commit 5999dd96e64c707339c7cd05b81956017080fbb3
Author: Yuriy Skalko <yuriy.ska...@gmail.com>
Date:   Thu Dec 10 14:32:55 2020 +0200

    Remove unnecessary `c_str`
---
 src/graphics/PreviewLoader.cpp |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/graphics/PreviewLoader.cpp b/src/graphics/PreviewLoader.cpp
index 63ddd43..d0590f6 100644
--- a/src/graphics/PreviewLoader.cpp
+++ b/src/graphics/PreviewLoader.cpp
@@ -380,8 +380,8 @@ PreviewLoader::Impl::Impl(PreviewLoader & p, Buffer const & 
b)
 {
        font_scaling_factor_ = int(buffer_.fontScalingFactor());
        if (theApp()) {
-               fg_color_ = 
convert(theApp()->hexName(foregroundColor()).c_str(), 16);
-               bg_color_ = 
convert(theApp()->hexName(backgroundColor()).c_str(), 16);
+               fg_color_ = convert(theApp()->hexName(foregroundColor()), 16);
+               bg_color_ = convert(theApp()->hexName(backgroundColor()), 16);
        } else {
                fg_color_ = 0x0;
                bg_color_ = 0xffffff;
@@ -444,8 +444,8 @@ PreviewLoader::Impl::preview(string const & latex_snippet) 
const
        int fg = 0x0;
        int bg = 0xffffff;
        if (theApp()) {
-               fg = convert(theApp()->hexName(foregroundColor()).c_str(), 16);
-               bg = convert(theApp()->hexName(backgroundColor()).c_str(), 16);
+               fg = convert(theApp()->hexName(foregroundColor()), 16);
+               bg = convert(theApp()->hexName(backgroundColor()), 16);
        }
        if (font_scaling_factor_ != fs || fg_color_ != fg || bg_color_ != bg) {
                // Schedule refresh of all previews on zoom or color changes.
-- 
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