Avoid NPE with broken file

poi-scratchpad/src/main/java/org/apache/poi/hslf/usermodel/HSLFShape.java

@@ -408,11 +408,13 @@ public abstract class HSLFShape implements Shape<HSLFShape,HSLFTextParagraph> {
         if (fSchemeIndex && sheet != null) {
             //red is the index to the color scheme
             ColorSchemeAtom ca = sheet.getColorScheme();
-            int schemeColor = ca.getColor(ecr.getSchemeIndex());
+            if (ca != null) {
+                int schemeColor = ca.getColor(ecr.getSchemeIndex());
 
-            rgb[0] = (schemeColor >> 0) & 0xFF;
-            rgb[1] = (schemeColor >> 8) & 0xFF;
-            rgb[2] = (schemeColor >> 16) & 0xFF;
+                rgb[0] = (schemeColor >> 0) & 0xFF;
+                rgb[1] = (schemeColor >> 8) & 0xFF;
+                rgb[2] = (schemeColor >> 16) & 0xFF;
+            }
         } else if (fPaletteIndex) {
             //TODO
         } else if (fPaletteRGB) {

poi-scratchpad/src/main/java/org/apache/poi/hslf/usermodel/HSLFTextParagraph.java

@@ -1665,6 +1665,9 @@ public final class HSLFTextParagraph implements TextParagraph<HSLFShape,HSLFText
                     return null;
                 }
                 ColorSchemeAtom ca = sheet.getColorScheme();
+                if (ca == null) {
+                    throw new IllegalStateException("Cannot read color scheme from sheet");
+                }
                 tmp = new Color(ca.getColor(cidx), true);
                 break;
             // Color is an sRGB value specified by red, green, and blue fields.

poi-scratchpad/src/test/java/org/apache/poi/hslf/dev/TestPPTXMLDump.java

@@ -37,6 +37,7 @@ public class TestPPTXMLDump extends BaseTestPPTIterating {
         LOCAL_EXCLUDED.add("clusterfuzz-testcase-minimized-POIHSLFFuzzer-6360479850954752.ppt");
         LOCAL_EXCLUDED.add("ppt_with_png_encrypted.ppt");
         LOCAL_EXCLUDED.add("clusterfuzz-testcase-minimized-POIHSLFFuzzer-6614960949821440.ppt");
+        LOCAL_EXCLUDED.add("60f557c0a46bcb0068b1c3e15589dac383307bc8.ppt");
     }
 
     @Test

poi-scratchpad/src/test/java/org/apache/poi/hslf/dev/TestSlideShowDumper.java

@@ -39,6 +39,7 @@ public class TestSlideShowDumper extends BaseTestPPTIterating {
         FAILING.add("41384.ppt");
         FAILING.add("bug56240.ppt");
         FAILING.add("clusterfuzz-testcase-minimized-POIHSLFFuzzer-6360479850954752.ppt");
+        FAILING.add("60f557c0a46bcb0068b1c3e15589dac383307bc8.ppt");
     }
 
     static final Set<String> LOCAL_EXCLUDED = new HashSet<>();