diff --git a/src/juce_appframework/gui/graphics/contexts/juce_Graphics.h b/src/juce_appframework/gui/graphics/contexts/juce_Graphics.h
index 0dfa8daa28..a962116893 100644
--- a/src/juce_appframework/gui/graphics/contexts/juce_Graphics.h
+++ b/src/juce_appframework/gui/graphics/contexts/juce_Graphics.h
@@ -584,7 +584,7 @@ public:
                                int sourceClipWidth,
                                int sourceClipHeight,
                                const AffineTransform& transform,
-                               const bool fillAlphaChannelWithCurrentBrush) const throw();
+                               const bool fillAlphaChannelWithCurrentBrush = false) const throw();
 
     /** Draws an image to fit within a designated rectangle.
 
@@ -613,7 +613,7 @@ public:
                           const int destWidth,
                           const int destHeight,
                           const RectanglePlacement& placementWithinTarget,
-                          const bool fillAlphaChannelWithCurrentBrush) const throw();
+                          const bool fillAlphaChannelWithCurrentBrush = false) const throw();
 
 
     //==============================================================================
diff --git a/src/juce_core/misc/juce_ZipFile.cpp b/src/juce_core/misc/juce_ZipFile.cpp
index 3b18302781..b195bc23d5 100644
--- a/src/juce_core/misc/juce_ZipFile.cpp
+++ b/src/juce_core/misc/juce_ZipFile.cpp
@@ -366,11 +366,12 @@ int ZipFile::findEndOfZipEntryTable (InputStream* input)
 
     in.setPosition (in.getTotalLength());
     int64 pos = in.getPosition();
+    const int64 lowestPos = jmax ((int64) 0, pos - 1024);
 
     char buffer [32];
     zeromem (buffer, sizeof (buffer));
 
-    while (pos > 0)
+    while (pos > lowestPos)
     {
         in.setPosition (pos - 22);
         pos = in.getPosition();