Hardened upload.tool property reading code for boards.txt

Fixes #1464

Author: cmaglie

app/src/processing/app/Editor.java

@@ -2433,6 +2433,10 @@ public void run() {
         if (serialMenu.getItemCount() == 0) statusError(e);
         else if (serialPrompt()) run();
         else statusNotice(_("Upload canceled."));
+      } catch (PreferencesMapException e) {
+        statusError(I18n.format(
+                    _("Error while uploading: missing '{0}' configuration parameter"),
+                    e.getMessage()));
       } catch (RunnerException e) {
         //statusError("Error during upload.");
         //e.printStackTrace();
@@ -2469,6 +2473,10 @@ public void run() {
         if (serialMenu.getItemCount() == 0) statusError(e);
         else if (serialPrompt()) run();
         else statusNotice(_("Upload canceled."));
+      } catch (PreferencesMapException e) {
+        statusError(I18n.format(
+                    _("Error while uploading: missing '{0}' configuration parameter"),
+                    e.getMessage()));
       } catch (RunnerException e) {
         //statusError("Error during upload.");
         //e.printStackTrace();

app/src/processing/app/debug/BasicUploader.java

@@ -51,7 +51,7 @@ public boolean uploadUsingPreferences(String buildPath, String className,
     TargetPlatform targetPlatform = Base.getTargetPlatform();
     PreferencesMap prefs = Preferences.getMap();
     prefs.putAll(Base.getBoardPreferences());
-    prefs.putAll(targetPlatform.getTool(prefs.get("upload.tool")));
+    prefs.putAll(targetPlatform.getTool(prefs.getOrExcept("upload.tool")));
 
     // if no protocol is specified for this board, assume it lacks a 
     // bootloader and upload using the selected programmer.