- Cleaned out some of the compiler warnings in the scenario editor (removing unused variables mostly).

- Finally removed the grow box in the corner of the scenario editor window.
- Changed #include <iostream> in several headers to #include <iosfwd>, since they were only present for the use of
  the ostream and istream classes, and cout/cin were unneeded.
- Changed bool to Boolean in the old structs, since that's what it was originally.
- Small changes to graphtool, including an overload of get_custom_rect.
- Added gcd function to mathutil; was needed for something in the new dialog engine


git-svn-id: http://openexile.googlecode.com/svn/trunk@71 4ebdad44-0ea0-11de-aab3-ff745001d230

osx/tools/mathutil.cpp

@@ -58,3 +58,13 @@ short move_to_zero(short val){
 		return val - 1;
 	return val;
 }
+
+short gcd(short a, short b){ // Grabbed from Wikipedia and translated to C code
+	short t;
+	while(b != 0){
+		t = b;
+		b = a % b;
+		a = t;
+	}
+	return a;
+}