Fix segfault on multidimensional dotted arrays, bug607.

Changes

@@ -24,6 +24,8 @@ indicates the contributor was also the author of the fix; Thanks!
 
 ****  Fix signed/unsigned parameter misconversion, bug606.  [Jeremy Bennett]
 
+****  Fix segfault on multidimensional dotted arrays, bug607.  [Jie Xu]
+
 ****  Fix package logic var compile error.
 
 

src/V3LinkDot.cpp

@@ -1563,6 +1563,7 @@ private:
 	    m_ds.init(m_curSymp);
 	    nodep->rhsp()->iterateAndNext(*this);
 	    nodep->thsp()->iterateAndNext(*this);
+	    nodep->attrp()->iterateAndNext(*this);
 	}
 	m_ds = lastStates;
     }

test_regress/t/t_param_mem_attr.v

@@ -21,10 +21,12 @@ module t (/*AUTOARG*/
    );
    input clk;
    wire [71:0] ctrl;
+   wire [7:0] cl;                       // this line is added 
 
    memory #(.words(72)) i_memory (.clk (clk));
 
    assign ctrl = i_memory.mem[0];
+   assign cl   = i_memory.mem[0][7:0];  // and this line
 endmodule