0029102: Missing points using GCPnts_QuasiUniformDeflection

Correct the method PerformCurve of GCPnts_QuasiUniformDeflection to get the proper derivative at the end of the current curve.

Improve the Draw commands "crvpoints" and "crvtpoints" so that to work with wires as composite curves.

tests/bugs/moddata_3/bug29102

@@ -0,0 +1,23 @@
+puts "======="
+puts "0029102"
+puts "======="
+puts ""
+##################################################
+# Missing points using GCPnts_QuasiUniformDeflection
+##################################################
+
+brestore [locate_data_file bug29102_Wire.brep] w
+
+set info [crvpoints r w 0.0005]
+
+regexp "Max defl: +(\[-0-9.+eE\]+)" $info full defl
+
+if {$defl > 0.0006} {
+  puts "Error: deflection $defl is greater than expected 0.0005"
+} else {
+  puts "OK: deflection $defl is within limit 0.0006"
+}
+
+smallview +X+Y
+fit
+set only_screen_axo 1