BugFix - running program without spectra without crushing

* removed bug from the last commit - annotation routine wont fail

prasopes/__init__.py

@@ -13,7 +13,7 @@ from . import zcetools_help
 from . import reactivitytools
 
 
-__version__ = "0.0.31"
+__version__ = "0.0.32"
 
 
 __all__ = ['config', 'datatools', 'docks', 'drltools', 'drltoos_gui', 'filetools',

prasopes/graphtools.py

@@ -379,11 +379,6 @@ def ann_spec(ms_spec, msdata, ann_limit=0.01):
         peakline = np.empty([len(maxargs)], dtype=[('x', np.float32), ('y', np.float32)])
         peakline['x'], peakline['y'] = xdata[maxargs], ydata[maxargs]
         peaks.append(peakline)
-    peaks = np.concatenate(peaks)
-
-    s_peaks = sub_peaks(peaks, msdata['texts'],
-                        np.diff(ms_spec.get_xlim()),
-                        np.diff(ms_spec.get_ylim()))
 
     # delete objects from the spectra
     for intensity in msdata['annotation']:
@@ -391,6 +386,14 @@ def ann_spec(ms_spec, msdata, ann_limit=0.01):
     # remove them from tracking
     msdata['annotation'].clear()
 
+    if len(peaks) == 0:
+        return
+    peaks = np.concatenate(peaks)
+
+    s_peaks = sub_peaks(peaks, msdata['texts'],
+                        np.diff(ms_spec.get_xlim()),
+                        np.diff(ms_spec.get_ylim()))
+
     dispints = cf.settings().value("view/intensities", type=bool)
     for peak in s_peaks:
         annotation = '{0:.2f}\n{1: .2e}'.format(peak[0], peak[1])\