dbghelp/dwarf: Properly parse line number header for DWARF4 debug info.

dlls/dbghelp/dwarf.c

@@ -2222,7 +2222,7 @@ static BOOL dwarf2_parse_line_numbers(const dwarf2_section_t* sections,
 {
     dwarf2_traverse_context_t   traverse;
     ULONG_PTR                   length;
-    unsigned                    insn_size, default_stmt;
+    unsigned                    insn_size, version, default_stmt;
     unsigned                    line_range, opcode_base;
     int                         line_base;
     unsigned char               offset_size;
@@ -2256,9 +2256,11 @@ static BOOL dwarf2_parse_line_numbers(const dwarf2_section_t* sections,
         WARN("out of bounds header\n");
         return FALSE;
     }
-    dwarf2_parse_u2(&traverse); /* version */
+    version = dwarf2_parse_u2(&traverse);
     dwarf2_parse_offset(&traverse, offset_size); /* header_len */
     insn_size = dwarf2_parse_byte(&traverse);
+    if (version >= 4)
+        dwarf2_parse_byte(&traverse); /* max_operations_per_instructions */
     default_stmt = dwarf2_parse_byte(&traverse);
     line_base = (signed char)dwarf2_parse_byte(&traverse);
     line_range = dwarf2_parse_byte(&traverse);