This corrects the issue raised in pull request #75 that breaks the

compile on clang and probably other finicky compilers (as well as
just being wrong).

extract/ExtCell.c

@@ -112,7 +112,7 @@ ExtCell(def, outName, doLength)
 	TxError("Cannot open output file: ");
 	perror(filename);
 #endif
-	return;
+	return NULL;
     }
 
     extNumFatal = extNumWarnings = 0;

utils/ihash.h

@@ -50,6 +50,7 @@ static __inline__ int IHashAlignedSize(int size)
     int result;
     /* Expand size to be double-word (64 bit) aligned */
     result = ((size + 7) / 8) * 8;
+    return result;
 }
 
 /* The IHashTable struct should not be manipulated directly by clients */