In reference to bug # 12415

Added assertion ( per warrne's request ) to detect null char occasionally appearing in the input
stream provided by necko
R=pollmann

htmlparser/src/nsScanner.cpp

@@ -265,8 +265,9 @@ PRBool nsScanner::Append(const char* aBuffer, PRUint32 aLen){
                   // it won't break UCS2 file
                   // Hack Start
                   for(PRInt32 i=0;i<unicharLength;i++)
-                     if(0x0000 == unichars[i])
-                        unichars[i] = 0x0020;
+                    NS_ASSERTION(0x0000 != unichars[i],"found a null character");
+                     //if(0x0000 == unichars[i])
+                        //unichars[i] = 0x0020;
                   // Hack End
 
 		  mBuffer.Append(unichars, unicharLength);

parser/htmlparser/src/nsScanner.cpp

@@ -265,8 +265,9 @@ PRBool nsScanner::Append(const char* aBuffer, PRUint32 aLen){
                   // it won't break UCS2 file
                   // Hack Start
                   for(PRInt32 i=0;i<unicharLength;i++)
-                     if(0x0000 == unichars[i])
-                        unichars[i] = 0x0020;
+                    NS_ASSERTION(0x0000 != unichars[i],"found a null character");
+                     //if(0x0000 == unichars[i])
+                        //unichars[i] = 0x0020;
                   // Hack End
 
 		  mBuffer.Append(unichars, unicharLength);