diff -ur a/Makefile b/Makefile
--- a/Makefile  2011-02-10 01:07:38.000000000 +0200
+++ b/Makefile  2011-02-11 01:19:11.360000001 +0200
@@ -1,6 +1,6 @@
 CC=g++
 CFLAGS=-O2 -c -Wall -I/usr/include
-LDFLAGS=-s -lpng
+LDFLAGS=-s

 SOURCES= \
        src/main.cpp \
diff -ur a/src/parser.cpp b/src/parser.cpp
--- a/src/parser.cpp    2011-02-10 20:53:04.000000000 +0200
+++ b/src/parser.cpp    2011-02-11 01:27:31.580000001 +0200
@@ -19,12 +19,12 @@
 {
 }

-void CParser::SetScript(const char* script)
+void CParser::SetScript(char* script)
 {
     m_script = script;
 }

-void CParser::SetInput(const char* input)
+void CParser::SetInput(char* input)
 {
     m_input = input;
 }
@@ -115,12 +115,9 @@
        case ']':
            if(m_stack.size() != 0)
            {
-               if(m_field[pos_in_field] != 0)
-               {
                    pos_in_field_in_script = m_stack.top();
                    m_stack.pop();
                    continue;
-               }
            }
            else
            {
diff -ur a/src/parser.h b/src/parser.h
--- a/src/parser.h      2011-02-10 20:53:01.000000000 +0200
+++ b/src/parser.h      2011-02-11 01:20:51.370000001 +0200
@@ -17,8 +17,8 @@
     CParser();
     virtual ~CParser();

-    void SetScript(const char* script);
-    void SetInput(const char* input);
+    void SetScript(char* script);
+    void SetInput(char* input);
     bool Parse();

 private: