Minor, use incrementType in for-progression codegen

This doesn't fix anything, just makes it easier to figure out values of what
types are used where. Progression increment is of its own type, which may be
different from asmElementType in case of Byte, Char, Short progressions

compiler/backend/src/org/jetbrains/jet/codegen/ExpressionCodegen.java

@@ -1068,12 +1068,12 @@ public class ExpressionCodegen extends JetVisitor<StackValue, StackValue> implem
 
             v.load(loopParameterVar, asmElementType);
             v.load(endVar, asmElementType);
-            v.load(incrementVar, asmElementType);
+            v.load(incrementVar, incrementType);
 
             Label negativeIncrement = new Label();
             Label afterIf = new Label();
 
-            if (asmElementType.getSort() == Type.DOUBLE) {
+            if (incrementType.getSort() == Type.DOUBLE) {
                 v.dconst(0.0);
             }
             else {
@@ -1100,7 +1100,7 @@ public class ExpressionCodegen extends JetVisitor<StackValue, StackValue> implem
 
             v.load(loopParameterVar, asmElementType);
             v.load(endVar, asmElementType);
-            v.load(incrementVar, asmElementType);
+            v.load(incrementVar, incrementType);
 
             Label negativeIncrement = new Label();
             Label afterIf = new Label();

compiler/testData/codegen/boxWithStdlib/ranges/forByteProgressionWithIntIncrement.kt

@@ -0,0 +1,7 @@
+fun box(): String {
+    for (element in 5.toByte()..1.toByte() step 255) {
+        return "Fail: iterating over an empty progression, element: $element"
+    }
+
+    return "OK"
+}

compiler/tests/org/jetbrains/jet/codegen/generated/BlackBoxWithStdlibCodegenTestGenerated.java

@@ -403,6 +403,11 @@ public class BlackBoxWithStdlibCodegenTestGenerated extends AbstractBlackBoxCode
             JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), "org.jetbrains.jet.generators.tests.GenerateTests", new File("compiler/testData/codegen/boxWithStdlib/ranges"), Pattern.compile("^(.+)\\.kt$"), true);
         }
         
+        @TestMetadata("forByteProgressionWithIntIncrement.kt")
+        public void testForByteProgressionWithIntIncrement() throws Exception {
+            doTestWithStdlib("compiler/testData/codegen/boxWithStdlib/ranges/forByteProgressionWithIntIncrement.kt");
+        }
+        
         @TestMetadata("multiAssignmentIterationOverIntRange.kt")
         public void testMultiAssignmentIterationOverIntRange() throws Exception {
             doTestWithStdlib("compiler/testData/codegen/boxWithStdlib/ranges/multiAssignmentIterationOverIntRange.kt");

compiler/tests/org/jetbrains/jet/resolve/JetResolveTestGenerated.java

@@ -162,7 +162,7 @@ public class JetResolveTestGenerated extends AbstractResolveTest {
         public void testAllFilesPresentInCandidatesPriority() throws Exception {
             JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), "org.jetbrains.jet.generators.tests.GenerateTests", new File("compiler/testData/resolve/candidatesPriority"), Pattern.compile("^(.+)\\.resolve$"), true);
         }
-
+        
         @TestMetadata("classObjectOuterResolve.resolve")
         public void testClassObjectOuterResolve() throws Exception {
             doTest("compiler/testData/resolve/candidatesPriority/classObjectOuterResolve.resolve");