Adding Unicode support to System plugin

git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@6050 212acab6-be3b-0410-9dea-997c60f758d6

Contrib/System/Source/Buffers.c

@@ -1,3 +1,5 @@
+// Unicode support by Jim Park -- 08/23/2007
+
 #include "stdafx.h"
 #include "Plugin.h"
 #include "System.h"
@@ -23,6 +25,18 @@ PLUGINFUNCTIONSHORT(Alloc)
 }
 PLUGINFUNCTIONEND
 
+PLUGINFUNCTIONSHORT(StrAlloc)
+{
+    int size;
+    if ((size = popint64()) == 0)
+    {
+        system_pushint(0);
+        return;
+    }
+    system_pushint((int) GlobalAlloc(GPTR, size * sizeof(TCHAR)));
+}
+PLUGINFUNCTIONEND
+
 PLUGINFUNCTIONSHORT(Copy)
 {
     int size = 0;