Fix more gcc 4.7 warnings.

3 files changed, 5 insertions, 5 deletions

diff --git a/src/utils/base64.cpp b/src/utils/base64.cpp
index 3906efc76..1ea75322b 100644
--- a/src/utils/base64.cpp
+++ b/src/utils/base64.cpp
@@ -155,7 +155,7 @@ unsigned char *php3_base64_decode(const unsigned char *string,
             case 0:
             case 1:
                 free(result);
-                return 0;
+                return nullptr;
             case 2:
                 k++;
             case 3:
diff --git a/src/utils/copynpaste.cpp b/src/utils/copynpaste.cpp
index 7bf7e59d4..98b98fbe9 100644
--- a/src/utils/copynpaste.cpp
+++ b/src/utils/copynpaste.cpp
@@ -431,7 +431,7 @@ bool sendBuffer(std::string& text)
             }
             close(fd[0]);
         }
-        execl("/usr/bin/xsel", "xsel", "-i", (char *)0);
+        execl("/usr/bin/xsel", "xsel", "-i", (char *)nullptr);
         exit(1);
     }
 
diff --git a/src/utils/xml.cpp b/src/utils/xml.cpp
index 56aa44ce3..10436067f 100644
--- a/src/utils/xml.cpp
+++ b/src/utils/xml.cpp
@@ -35,7 +35,7 @@
 namespace XML
 {
     Document::Document(const std::string &filename, bool useResman):
-        mDoc(0)
+        mDoc(nullptr)
     {
         int size;
         char *data = nullptr;
@@ -87,7 +87,7 @@ namespace XML
         if (data)
             mDoc = xmlParseMemory(data, size);
         else
-            mDoc = 0;
+            mDoc = nullptr;
     }
 
     Document::~Document()
@@ -98,7 +98,7 @@ namespace XML
 
     xmlNodePtr Document::rootNode()
     {
-        return mDoc ? xmlDocGetRootElement(mDoc) : 0;
+        return mDoc ? xmlDocGetRootElement(mDoc) : nullptr;
     }
 
     int getProperty(xmlNodePtr node, const char* name, int def)