fix hang in pdb parsing with single line file

ef819448 · Maarten L. Hekkelman · b3b53ebc · ef819448
Commit ef819448 authored Jan 11, 2021 by Maarten L. Hekkelman
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src/PDB2Cif.cpp
+3 -0

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--- a/src/PDB2Cif.cpp
+++ b/src/PDB2Cif.cpp
@@ -1176,6 +1176,9 @@ void PDBFileParser::PreParseInput(std::istream& is)
 			
 			if (type != "END")	// special case
 				dropped.insert(type);
+
+			lookahead.clear();
+
 			continue;
 		}