[LyX/master] Fix unintialized variables spotted by coverity

[Jean-Marc Lasgouttes]

commit e263fe8e03b9b506e8355e5a11cb3ec717c29592
Author: Jean-Marc Lasgouttes <lasgouttes at lyx.org>
Date:   Sun Feb 20 17:02:04 2022 +0100

    Fix unintialized variables spotted by coverity
    
    The InsetWrap case happens in decodeInsetParaps (InsetCommand.cpp),
    where the default constructor is invoked. In this case, lines was not
    initialized.
---
 src/insets/InsetWrap.cpp  |    4 ----
 src/insets/InsetWrap.h    |    8 ++++----
 src/mathed/MathParser.cpp |    2 +-
 3 files changed, 5 insertions(+), 9 deletions(-)

diff --git a/src/insets/InsetWrap.cpp b/src/insets/InsetWrap.cpp
index c862b17..8987405 100644
--- a/src/insets/InsetWrap.cpp
+++ b/src/insets/InsetWrap.cpp
@@ -47,10 +47,6 @@ InsetWrap::InsetWrap(Buffer * buf, string const & type)
 	: InsetCaptionable(buf)
 {
 	setCaptionType(type);
-	params_.lines = 0;
-	params_.placement = "o";
-	params_.overhang = Length(0, Length::PCW);
-	params_.width = Length(50, Length::PCW);
 }
 
 
diff --git a/src/insets/InsetWrap.h b/src/insets/InsetWrap.h
index 02e0a20..a44821e 100644
--- a/src/insets/InsetWrap.h
+++ b/src/insets/InsetWrap.h
@@ -30,13 +30,13 @@ public:
 	///
 	std::string type;
 	///
-	int lines;
+	int lines = 0;
 	///
-	std::string placement;
+	std::string placement = "o";
 	///
-	Length overhang;
+	Length overhang = Length(0, Length::PCW);
 	///
-	Length width;
+	Length width = Length(50, Length::PCW);
 };
 
 
diff --git a/src/mathed/MathParser.cpp b/src/mathed/MathParser.cpp
index 6d1b747..0ba3375 100644
--- a/src/mathed/MathParser.cpp
+++ b/src/mathed/MathParser.cpp
@@ -1369,7 +1369,7 @@ bool Parser::parse1(InsetMathGrid & grid, unsigned flags,
 			// otherwise parse it as an user macro
 			MathData count;
 			parse(count, FLAG_ITEM, mode);
-			int cols;
+			int cols = 0;
 			// limit arbitrarily to 100 columns
 			if (extractNumber(count, cols) && cols > 0 && cols < 100) {
 				// resize the table if necessary