Code problems detected by cppcheck

Source/core/rendering/InlineTextBox.cpp

Index: Source/core/rendering/InlineTextBox.cpp
diff --git a/Source/core/rendering/InlineTextBox.cpp b/Source/core/rendering/InlineTextBox.cpp
index 6d579f77c9f280d5809099867737dabaab07f063..5ab175efbf6e2da19540711a1d845ad9ebf0a9f4 100755
--- a/Source/core/rendering/InlineTextBox.cpp
+++ b/Source/core/rendering/InlineTextBox.cpp
@@ -1291,7 +1291,7 @@ void InlineTextBox::paintDocumentMarkers(GraphicsContext* pt, const FloatPoint&
 
     // Give any document markers that touch this run a chance to draw before the text has been drawn.
     // Note end() points at the last char, not one past it like endOffset and ranges do.
-    for ( ; markerIt != markers.end(); markerIt++) {
+    for ( ; markerIt != markers.end(); ++markerIt) {
         DocumentMarker* marker = *markerIt;
 
         // Paint either the background markers or the foreground markers, but not both