From 11dd06436d6144420cc6f5b5d9a926e7f34818b1 Mon Sep 17 00:00:00 2001
From: "David A. Mellis" <d.mellis@arduino.cc>
Date: Sat, 11 Dec 2010 15:22:07 -0500
Subject: Changing String append to use realloc(); thanks to Paul Stoffregen.

http://code.google.com/p/arduino/issues/detail?id=332
---
 cores/arduino/WString.cpp | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/cores/arduino/WString.cpp b/cores/arduino/WString.cpp
index 4de9296..db5a441 100644
--- a/cores/arduino/WString.cpp
+++ b/cores/arduino/WString.cpp
@@ -150,14 +150,16 @@ const String & String::operator+=( const String &other )
   _length += other._length;
   if ( _length > _capacity )
   {
-    char *temp = _buffer;
-    getBuffer( _length );
-    if ( _buffer != NULL )
-      strcpy( _buffer, temp );
-    free(temp);
+    char *temp = (char *)realloc(_buffer, _length + 1);
+    if ( temp != NULL ) {
+      _buffer = temp;
+      _capacity = _length;
+    } else {
+      _length -= other._length;
+      return *this;
+    }
   }
-  if ( _buffer != NULL )
-    strcat( _buffer, other._buffer );
+  strcat( _buffer, other._buffer );
   return *this;
 }
 
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