improve snippets

- shorter SnippetCodeStyleIfFor
- assert scip non-null in public

Author: svigerske

Diff for: src/scip/branch_relpscost.c

@@ -437,11 +437,11 @@ SCIP_RETCODE countNonlinearities(
          /* get active index of resultant */
          probindex = SCIPvarGetProbindex(SCIPvarGetProbvar(andres));
 
-         /**! [SnippetCodeStyleIfFor] */
          /* the resultant might be deleted */
          if( probindex >= 0 )
             ++nlcount[probindex];
 
+         /**! [SnippetCodeStyleIfFor] */
          for( v = 0; v < nandvars; ++v )
          {
             /* get active index of operator */
@@ -625,7 +625,6 @@ SCIP_RETCODE addBdchg(
 }
 
 /**! [SnippetCodeStyleStaticAsserts] */
-
 /** frees bound change arrays */
 static
 void freeBdchgs(
@@ -636,11 +635,11 @@ void freeBdchgs(
    int*                  nbdchgs             /**< pointer to number of bound changes */
    )
 {
+   assert(scip != NULL);
    assert(bdchginds != NULL);
    assert(bdchgtypes != NULL);
    assert(bdchgbounds != NULL);
    assert(nbdchgs != NULL);
-
 /**! [SnippetCodeStyleStaticAsserts] */
 
    SCIPfreeBufferArrayNull(scip, bdchgbounds);