Debian Bug#585442: python-matplotlib: crashes when calling axis() after imshow()

This allows the C++ exception raised when Agg rendering complexity is exceeded to percolate up correctly to a Python exception, rather than crashing the interpreter.
Fixes problem in last commit.

svn path=/trunk/matplotlib/; revision=8455

Author: mdboom

agg24/include/agg_rasterizer_cells_aa.h

@@ -179,16 +179,15 @@ namespace agg
     template<class Cell>
     AGG_INLINE void rasterizer_cells_aa<Cell>::add_curr_cell()
     {
-        static Py::Exception e(
-            Py::OverflowError(
-                "Agg rendering complexity exceeded. Consider downsampling or decimating your data."));
-
-
         if(m_curr_cell.area | m_curr_cell.cover)
         {
             if((m_num_cells & cell_block_mask) == 0)
             {
                 if(m_num_blocks >= cell_block_limit) {
+                    static Py::Exception e(
+                        Py::OverflowError(
+                            "Agg rendering complexity exceeded. Consider downsampling or decimating your data."));
+
                     /* If this exception is thrown too often, one can
                        increase cell_block_limit */
                     throw e;