Add missing includes

And a build warning about unsued var

pcbnew/pad.cpp

@@ -47,6 +47,7 @@
 #include <pad_utils.h>
 #include <pcb_shape.h>
 #include <connectivity/connectivity_data.h>
+#include <drc/drc_engine.h>
 #include <eda_units.h>
 #include <convert_basic_shapes_to_polygon.h>
 #include <widgets/msgpanel.h>

pcbnew/pcb_marker.cpp

@@ -37,6 +37,7 @@
 #include <widgets/ui_common.h>
 #include <pgm_base.h>
 #include <drc/drc_item.h>
+#include <drc/drc_rule.h>
 #include <trigo.h>
 #include <properties/property.h>
 #include <properties/property_mgr.h>

pcbnew/pcb_shape.cpp

@@ -38,6 +38,7 @@
 #include <lset.h>
 #include <pad.h>
 #include <base_units.h>
+#include <drc/drc_engine.h>
 #include <geometry/shape_circle.h>
 #include <geometry/shape_compound.h>
 #include <geometry/point_types.h>

pcbnew/pcb_table.cpp

@@ -162,8 +162,6 @@ void PCB_TABLE::Normalize()
     VECTOR2I localCell0Center( cell0Width / 2, cell0Height / 2 );
     RotatePoint( localCell0Center, cellAngle );
 
-    VECTOR2I tableOrigin = stableCenter - localCell0Center;
-
     if( cellAngle != ANGLE_0 )
     {
         for( PCB_TABLECELL* cell : m_cells )