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diff -up alienblaster/src/options.cc~ alienblaster/src/options.cc
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--- alienblaster/src/options.cc~	2007-07-22 21:13:29.000000000 +0200
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+++ alienblaster/src/options.cc	2007-07-22 21:13:29.000000000 +0200
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@@ -48,7 +48,7 @@ Options::Options(const string lFilename)
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       string newLine;
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       getline( inputFile, newLine );
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       // search delimiter
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-      unsigned int pos = newLine.find("=");
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+      string::size_type pos = newLine.find("=");
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       // comment line or no delimiter found
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       if (( newLine[0] != '#' ) && ( pos != string::npos )) {
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 	string key = newLine.substr(0,pos);
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diff -up alienblaster/src/font.cc~ alienblaster/src/font.cc
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--- alienblaster/src/font.cc~	2007-07-22 21:14:44.000000000 +0200
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+++ alienblaster/src/font.cc	2007-07-22 21:14:44.000000000 +0200
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@@ -84,7 +84,7 @@ void Font::drawInt(SDL_Surface *screen, 
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       destR.w = charWidth;
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       destR.h = charHeight;
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-      unsigned int charsetpos = charset.find( (char)((val % 10) + '0') );
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+      string::size_type charsetpos = charset.find( (char)((val % 10) + '0') );
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       if (charsetpos != string::npos ) {
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 	srcR.x = charsetpos * charWidth;
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       } else {
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@@ -127,7 +127,7 @@ void Font::drawStr(SDL_Surface *screen, 
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   SDL_Rect srcR;
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   int x = 0;
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-  unsigned int charsetpos;
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+  string::size_type charsetpos;
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   for(unsigned int i=0; i < text.size(); ++i) {
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     x = 0;
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     charsetpos = charset.find(text[i]);