Minor bug fixes and add glError check.
diff --git a/rsProgramRaster.cpp b/rsProgramRaster.cpp
index fcf6824..51ae7cf 100644
--- a/rsProgramRaster.cpp
+++ b/rsProgramRaster.cpp
@@ -74,7 +74,7 @@
     if (mLineSmooth) {
         glEnable(GL_LINE_SMOOTH);
     } else {
-        glEnable(GL_LINE_SMOOTH);
+        glDisable(GL_LINE_SMOOTH);
     }
 
     if (rsc->checkVersion1_1()) {