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diff -up bolzplatz2006/libsrc/jirr-dev/src/java/net/sf/jirr/SMaterial.java~ bolzplatz2006/libsrc/jirr-dev/src/java/net/sf/jirr/SMaterial.java
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--- jirr/src/java/net/sf/jirr/SMaterial.java~	2007-09-08 11:57:38.000000000 +0200
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+++ jirr/src/java/net/sf/jirr/SMaterial.java	2007-09-08 11:57:38.000000000 +0200
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@@ -98,7 +98,9 @@ public class SMaterial {
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   }
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   public void setTexture(int index, ITexture texture) {
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-    JirrJNI.SMaterial_setTexture(swigCPtr, this, index, ITexture.getCPtr(texture), texture);
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+    // Work around for missing materials better to have no texture then to crash
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+    if (swigCPtr != 0)
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+      JirrJNI.SMaterial_setTexture(swigCPtr, this, index, ITexture.getCPtr(texture), texture);
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   }
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   public boolean notEqualsOperator(SMaterial b) {