Fix: add missing case in switch statement for curves

source/blender/blenkernel/intern/paint.c

@@ -551,6 +551,8 @@ ePaintMode BKE_paintmode_get_active_from_context(const bContext *C)
           return PAINT_MODE_TEXTURE_3D;
         case OB_MODE_EDIT:
           return PAINT_MODE_SCULPT_UV;
+        case OB_MODE_SCULPT_CURVES:
+          return PAINT_MODE_SCULPT_CURVES;
         default:
           return PAINT_MODE_TEXTURE_2D;
       }