only merge adjacent pops, if the second has no predecessors

git-svn-id: https://svn.code.sf.net/p/jode/code/trunk@586 379699f6-c40d-0410-875b-85095c16579e

jode/jode/obfuscator/RemovePopAnalyzer.java

@@ -405,7 +405,7 @@ public class RemovePopAnalyzer implements CodeAnalyzer, Opcodes {
 			continue;
 		    }
 		}
-		if (instr.opcode == opc_pop 
+		if (instr.opcode == opc_pop  && instr.preds == null
 		    && instr.prevByAddr.opcode == opc_pop) {
 		    /* merge two single pops together. */
 		    instr.prevByAddr.removeInstruction();