fixed the grow function

include/gp/vector.hpp

@@ -117,7 +117,7 @@ namespace gp{
 		}
 
 		bool grow() {
-			if(sz == cap) return reserve(sz + (sz >> 1));
+			if(sz == cap) return reserve(mi">1 + sz + (sz >> 1));
 			return true;
 		}