Cleanup: style, use braces in source/

Automated using clang-tidy.

source/blender/freestyle/intern/python/BinaryPredicate1D/BPy_ViewMapGradientNormBP1D.cpp

@@ -75,8 +75,9 @@ static int ViewMapGradientNormBP1D___init__(BPy_ViewMapGradientNormBP1D *self,
   float f = 2.0;
 
   if (!PyArg_ParseTupleAndKeywords(
-          args, kwds, "i|O!f", (char **)kwlist, &i, &IntegrationType_Type, &obj, &f))
+          args, kwds, "i|O!f", (char **)kwlist, &i, &IntegrationType_Type, &obj, &f)) {
     return -1;
+  }
   IntegrationType t = (obj) ? IntegrationType_from_BPy_IntegrationType(obj) : MEAN;
   self->py_bp1D.bp1D = new Predicates1D::ViewMapGradientNormBP1D(i, t, f);
   return 0;