Allowing the interface to ignore NULL pointers in the context object.

sass_interface.cpp

@@ -17,8 +17,8 @@ extern "C" char* sass_compile(sass_context* c_ctx)
   // TO DO: CATCH ALL EXCEPTIONS
   Context cpp_ctx;
   
-  cpp_ctx.sass_path = string(c_ctx->sass_path);
-  cpp_ctx.css_path  = string(c_ctx->css_path);
+  cpp_ctx.sass_path = string(c_ctx->sass_path ? c_ctx->sass_path : "");
+  cpp_ctx.css_path  = string(c_ctx->css_path  ? c_ctx->css_path  : "");
 
   const size_t wd_len = 1024;
   char wd[wd_len];

sassc.c

@@ -28,9 +28,9 @@ int main(int argc, char** argv)
 	}
 	
 	struct sass_context* ctx = sass_new_context();
-	ctx->sass_path = "";
-	ctx->css_path = "";
-	ctx->include_paths = "";
+	ctx->sass_path = NULL;
+	ctx->css_path = NULL;
+	ctx->include_paths = NULL;
 	ctx->output_style = 0;
 	ctx->input_file = argv[1];
 	ctx->input_string = NULL;