Fixed #4505 (test/testtokenize.cpp: Assertion failed in 'make check')

lib/tokenlist.cpp

@@ -294,19 +294,11 @@ bool TokenList::createTokens(std::istream &code, const std::string& file0)
                 std::getline(code, line);
 
                 // Update the current line number
-                std::string::size_type n = 0;
-                while (n < line.size() && std::isspace(line[n]))
-                    ++n;
-                if (n == line.size())
+                unsigned int row;
+                if (!(std::stringstream(line) >> row))
                     ++lineno;
-                else {
-                    while (n < line.size() && std::isdigit(line[n]))
-                        ++n;
-                    if (n < line.size() && !std::isspace(line[n]))
-                        ++lineno;
-                    else
-                        std::istringstream(line) >> lineno;
-                }
+                else
+                    lineno = row;
                 CurrentToken.clear();
                 continue;
             } else if (CurrentToken == "#endfile") {