[LyX/master] Fix warnings and use range-based loop

[Yuriy Skalko]

commit e0f553b941ef2a14da046e1f4e10acbf3d63b08d
Author: Yuriy Skalko <yuriy.skalko at gmail.com>
Date:   Wed Dec 2 00:16:55 2020 +0200

    Fix warnings and use range-based loop
---
 src/frontends/qt/Menus.cpp |   14 ++++++--------
 1 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/src/frontends/qt/Menus.cpp b/src/frontends/qt/Menus.cpp
index 8437ace..e567c64 100644
--- a/src/frontends/qt/Menus.cpp
+++ b/src/frontends/qt/Menus.cpp
@@ -1809,12 +1809,8 @@ void MenuDefinition::expandQuotes(BufferView const * bv)
 	InsetQuotes const * qinset =
 		static_cast<InsetQuotes const *>(inset);
 
-	map<string, docstring> styles = quoteparams.getTypes();
 	string const qtype = qinset->getType();
 
-	map<string, docstring>::const_iterator qq = styles.begin();
-	map<string, docstring>::const_iterator end = styles.end();
-
 	MenuDefinition aqs;
 
 	BufferParams const & bp = bv->buffer().masterBuffer()->params();
@@ -1856,10 +1852,12 @@ void MenuDefinition::expandQuotes(BufferView const * bv)
 		main_dynamic_qs = true;
 	}
 	// now traverse through the static styles ...
-	for (; qq != end; ++qq) {
-		docstring const style = from_ascii(qq->first);
-		bool langdef = (style[0] == langqs);
-		bool globaldef = (style[0] == globalqsc);
+	map<string, docstring> styles = quoteparams.getTypes();
+	for (auto const & s : styles) {
+		char style_char = (s.first)[0];
+		bool langdef = (style_char == langqs);
+		bool globaldef = (style_char == globalqsc);
+		docstring const style = from_ascii(s.first);
 
 		if (prefixIs(style, qtype[0])) {
 			FuncRequest cmd = FuncRequest(LFUN_INSET_MODIFY, subcmd + style);