Merge pull request #52 from atillack/empty_string

Fix for the Windows fix of PR #26.

Author: atillack

src/lib/parse_pdbqt.cpp

@@ -344,6 +344,7 @@ void parse_pdbqt_aux(std::istream& in, parsing_struct& p, context& c, boost::opt
         add_context(c, str);
 
         if(str.empty()) {} // ignore ""
+        if(str[0] == '\0') {} // ignore a different kind of emptiness (potential issues on Windows)
         else if(starts_with(str, "WARNING")) {} // ignore - AutoDockTools bug workaround
         else if(starts_with(str, "REMARK")) {} // ignore
         else if(starts_with(str, "BRANCH")) parse_pdbqt_branch_aux(in, str, p, c);
@@ -352,7 +353,6 @@ void parse_pdbqt_aux(std::istream& in, parsing_struct& p, context& c, boost::opt
                 throw pdbqt_parse_error("TORSDOF keyword can be defined only once.");
             torsdof = parse_one_unsigned(str, "TORSDOF");
         }
-        else if (str.find_first_not_of(" \t\v\r") != std::string::npos) {} // ignore lines only consisting of spaces, tabs, vertical tabs, and/or carriage returns
         else if(residue && starts_with(str, "END_RES"))
             return; 
         else if(starts_with(str, "MODEL"))