Revert "Remove FX_Alloc() null checks now that it can't return NULL."

core/src/fxge/agg/agg23/fx_agg_path_storage.cpp

Index: core/src/fxge/agg/agg23/fx_agg_path_storage.cpp
diff --git a/core/src/fxge/agg/agg23/fx_agg_path_storage.cpp b/core/src/fxge/agg/agg23/fx_agg_path_storage.cpp
index b62d4baa1c8df2073b83a3c0ab14cf930ddc6bde..b4b184e0a4abcc859574dff1afc67c1490b26248 100644
--- a/core/src/fxge/agg/agg23/fx_agg_path_storage.cpp
+++ b/core/src/fxge/agg/agg23/fx_agg_path_storage.cpp
@@ -71,6 +71,9 @@ void path_storage::allocate_block(unsigned nb)
         FX_Alloc( FX_FLOAT, block_size * 2 +
                   block_size /
                   (sizeof(FX_FLOAT) / sizeof(unsigned char)));
+    if (!m_coord_blocks[nb]) {
+        return;
+    }
     m_cmd_blocks[nb]  =
         (unsigned char*)(m_coord_blocks[nb] + block_size * 2);
     m_total_blocks++;