0024059: Eliminate compiler warning C4701 in MSVC++ with warning level 4

Removing pPotentially uninitialized local variable
Got rid of most of warnings C4701: Potentially uninitialized local variable
Removed redundant variable definitions.
Refactored a part of AppParCurves_ResolConstraint CTOR.
Replaced 0. to Precision::Confusion for tolerance vars;
Changed values for min and max parameter vars;
Got rid of redundant variables' initialization.

src/Convert/Convert_ConicToBSplineCurve.cxx

@@ -344,17 +344,17 @@ void Convert_ConicToBSplineCurve::BuildCosAndSin(
   q_param,
   param ;
 
-  Standard_Integer num_poles,
+  Standard_Integer num_poles = 0,
   ii,
   jj,
-  num_knots=0,
-  num_spans=0,
+  num_knots = 1,
+  num_spans = 1,
   num_flat_knots,
   num_temp_knots,
-  temp_degree=0,
+  temp_degree = 0,
   tgt_theta_flag,
   num_temp_poles,
-  order ;
+  order  = 0;
 
   Convert_CosAndSinEvalFunction *EvaluatorPtr=NULL ;