Do not resolve the lists of spans for LineInfos and Scopes, but keep them as

ids. This way, we can delay loading spans until we know that we definitely
need an object file. 
Did some restructuring for writing of span lists to the debug info file.


git-svn-id: svn://svn.cc65.org/cc65/trunk@5261 b7a2c559-68d2-44c3-8de9-860c34a00d81

src/ld65/lineinfo.h

@@ -77,7 +77,7 @@ struct LineInfo {
     struct FileInfo*    File;	        /* File struct for this line if any */
     unsigned            Type;           /* Type of line info */
     FilePos             Pos;            /* Position in file */
-    Collection          Spans;          /* Spans for this line */
+    unsigned*           Spans;          /* Spans for this line */
 };