tidy: fix conversion unsigned -> signed

alib2algo/src/stringology/exact/QuiteNaive.h

@@ -50,11 +50,12 @@ ext::set < unsigned > QuiteNaive::match ( const string::LinearString < SymbolTyp
 		if ( pat[m-1] != text[s+m-1] ) {
 			s += gamma;
 		} else {
-			ssize_t j = m - 2;
-			while ( j >= 0 && pat[j] == text[s+j] )
-				-- j;
-			if ( j < 0 )
+			// Note: loop here goes in other direction than in the paper
+			size_t j = 0;
+			while ( j + 2 <= m && pat[j] == text[s+j] )
+				++ j;
+			if ( j + 2 > m )
 				occ.insert(s);
 			s += delta;
 		}