Cleaned up a few static analyser warnings.

extras/Introjucer/Source/Application/jucer_MainWindow.cpp

@@ -242,10 +242,13 @@ bool MainWindow::shouldDropFilesWhenDraggedExternally (const DragAndDropTarget::
         {
             for (int i = selected.size(); --i >= 0;)
             {
-                const File f (selected.getUnchecked(i)->getDraggableFile());
+                if (JucerTreeViewBase* tv = selected.getUnchecked(i))
+                {
+                    const File f (tv->getDraggableFile());
 
-                if (f.existsAsFile())
-                    files.add (f.getFullPathName());
+                    if (f.existsAsFile())
+                        files.add (f.getFullPathName());
+                }
             }
 
             canMoveFiles = false;

extras/Introjucer/Source/Code Editor/jucer_SourceCodeEditor.cpp

@@ -400,8 +400,11 @@ void GenericCodeEditorComponent::showFindPanel()
         resized();
     }
 
-    findPanel->editor.grabKeyboardFocus();
-    findPanel->editor.selectAll();
+    if (findPanel != nullptr)
+    {
+        findPanel->editor.grabKeyboardFocus();
+        findPanel->editor.selectAll();
+    }
 }
 
 void GenericCodeEditorComponent::hideFindPanel()

modules/juce_core/zip/zlib/deflate.c

@@ -333,7 +333,8 @@ int ZEXPORT deflateSetDictionary (z_streamp strm, const Bytef *dictionary, uInt
     for (n = 0; n <= length - MIN_MATCH; n++) {
         INSERT_STRING(s, n, hash_head);
     }
-    if (hash_head) hash_head = 0;  /* to make compiler happy */
+
+    (void) hash_head;  /* to make compiler happy */
     return Z_OK;
 }
 

modules/juce_graphics/image_formats/jpglib/jcparam.c

@@ -592,7 +592,7 @@ jpeg_simple_progression (j_compress_ptr cinfo)
     scanptr = fill_a_scan(scanptr, 2, 1, 63, 1, 0);
     scanptr = fill_a_scan(scanptr, 1, 1, 63, 1, 0);
     /* Luma bottom bit comes last since it's usually largest scan */
-    scanptr = fill_a_scan(scanptr, 0, 1, 63, 1, 0);
+    fill_a_scan(scanptr, 0, 1, 63, 1, 0);
   } else {
     /* All-purpose script for other color spaces. */
     /* Successive approximation first pass */
@@ -603,7 +603,7 @@ jpeg_simple_progression (j_compress_ptr cinfo)
     scanptr = fill_scans(scanptr, ncomps, 1, 63, 2, 1);
     /* Successive approximation final pass */
     scanptr = fill_dc_scans(scanptr, ncomps, 1, 0);
-    scanptr = fill_scans(scanptr, ncomps, 1, 63, 1, 0);
+    fill_scans(scanptr, ncomps, 1, 63, 1, 0);
   }
 }