Fix getTempI32() that it work without the removed prepare phase.

Author: Volker

src/de/inetsoftware/jwebassembly/module/LocaleVariableManager.java

@@ -83,13 +83,6 @@ void use( ValueType valueType, int slot ) {
         var.valueType = valueType;
     }
 
-    /**
-     * We need an extra temporary variable inn the WebAssembly code.
-     */
-    void useTempI32() {
-        needTempI32 = true;
-    }
-
     /**
      * Calculate the WebAssembly index position on the consumed data.
      */
@@ -131,7 +124,8 @@ List<ValueType> getLocalTypes( int paramCount ) {
      * @return the slot
      */
     int getTempI32() {
-        return size - 1;
+        needTempI32 = true;
+        return -1;
     }
 
     /**
@@ -142,6 +136,9 @@ int getTempI32() {
      * @return the variable index in WebAssembly
      */
     int get( int slot ) {
+        if( slot < 0 ) {
+            slot = size - 1; // temp i32
+        }
         return variables[slot].idx;
     }
 

src/de/inetsoftware/jwebassembly/module/ModuleGenerator.java

@@ -751,7 +751,6 @@ private void writeSwitchCode( CodeInputStream byteCode, boolean isLookupSwitch )
         int[] keys;
         int[] positions;
         if( isLookupSwitch ) { // lookupswitch
-            localVariables.useTempI32(); //TODO
             int count = byteCode.readInt();
             keys = new int[count];
             positions = new int[count];