[LyX/master] Fix #12069: Broken search

[Kornel Benko]

commit 9bdd0b31db2e08c869c8723ebe82b5471edc9e27
Author: Kornel Benko <kornel at lyx.org>
Date:   Thu Jan 14 14:33:55 2021 +0100

    Fix #12069: Broken search
    
    Do not count ignored characters as matching
---
 src/Paragraph.cpp |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/src/Paragraph.cpp b/src/Paragraph.cpp
index d954e1e..cc0a765 100644
--- a/src/Paragraph.cpp
+++ b/src/Paragraph.cpp
@@ -4393,6 +4393,7 @@ int Paragraph::find(docstring const & str, bool cs, bool mw,
 			if (pos == parsize - 1)
 				break;
 			pos++;
+			--i;
 			continue;
 		}
 		// Ignore "invisible" letters such as ligature breaks