[LyX/master] Fix warnings

[Richard Kimberly Heck]

commit 5728625b65b7366c9679b11d49159044f2650501
Author: Richard Kimberly Heck <rikih...@lyx.org>
Date:   Fri Feb 28 01:16:21 2020 -0500

    Fix warnings
---
 src/BufferList.cpp |   26 +++++++++++++-------------
 1 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/src/BufferList.cpp b/src/BufferList.cpp
index 264facd..b99f459 100644
--- a/src/BufferList.cpp
+++ b/src/BufferList.cpp
@@ -140,7 +140,7 @@ Buffer * BufferList::createNewBuffer(string const & s)
                        exit(1);
                } else if (message.type_ == WarningException) {
                        Alert::warning(message.title_, message.details_);
-                       return 0;
+                       return nullptr;
                }
        }
        tmpbuf->params().useClassDefaults();
@@ -167,7 +167,7 @@ FileNameList BufferList::fileNames() const
 Buffer * BufferList::first()
 {
        if (bstore.empty())
-               return 0;
+               return nullptr;
        return bstore.front();
 }
 
@@ -175,7 +175,7 @@ Buffer * BufferList::first()
 Buffer * BufferList::last()
 {
        if (bstore.empty())
-               return 0;
+               return nullptr;
        return bstore.back();
 }
 
@@ -183,7 +183,7 @@ Buffer * BufferList::last()
 Buffer * BufferList::getBuffer(unsigned int choice)
 {
        if (choice >= bstore.size())
-               return 0;
+               return nullptr;
        return bstore[choice];
 }
 
@@ -191,13 +191,13 @@ Buffer * BufferList::getBuffer(unsigned int choice)
 Buffer * BufferList::next(Buffer const * buf) const
 {
        // Something is wrong, but we can probably survive it.
-       LASSERT(buf, return 0);
+       LASSERT(buf, return nullptr);
 
        if (bstore.empty())
-               return 0;
+               return nullptr;
        BufferStorage::const_iterator it =
                        find(bstore.begin(), bstore.end(), buf);
-       LASSERT(it != bstore.end(), return 0);
+       LASSERT(it != bstore.end(), return nullptr);
        ++it;
        Buffer * nextbuf = (it == bstore.end()) ? bstore.front() : *it;
        return nextbuf;
@@ -207,13 +207,13 @@ Buffer * BufferList::next(Buffer const * buf) const
 Buffer * BufferList::previous(Buffer const * buf) const
 {
        // Something is wrong, but we can probably survive it.
-       LASSERT(buf, return 0);
+       LASSERT(buf, return nullptr);
 
        if (bstore.empty())
-               return 0;
+               return nullptr;
        BufferStorage::const_iterator it =
                        find(bstore.begin(), bstore.end(), buf);
-       LASSERT(it != bstore.end(), return 0);
+       LASSERT(it != bstore.end(), return nullptr);
 
        Buffer * previousbuf = (it == bstore.begin()) ? bstore.back() : *(it - 
1);
        return previousbuf;
@@ -252,7 +252,7 @@ void BufferList::invalidateConverterCache() const
 
 bool BufferList::exists(FileName const & fname) const
 {
-       return getBuffer(fname) != 0;
+       return getBuffer(fname) != nullptr;
 }
 
 
@@ -314,7 +314,7 @@ Buffer * BufferList::getBuffer(support::FileName const & 
fname, bool internal) c
                        if (equivalent(b->fileName(), fname))
                                return b;
        }
-       return 0;
+       return nullptr;
 }
 
 
@@ -337,7 +337,7 @@ Buffer * BufferList::getBufferFromTmp(string const & s, 
bool realpath)
                        }
                }
        }
-       return 0;
+       return nullptr;
 }
 
 
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