Properly handle 'default' nested in flow control, as well as default/case…

Test/switch.frag

@@ -109,8 +109,13 @@ void main()
             break;
         }
         break;
-    default:
+    case 4:
         f = tan(x);
+        if (f < 0.0)
+            default:            // ERROR
+                break;
     }
 
+    case 5:  // ERROR
+    default: // ERROR
 }

glslang/Include/revision.h

@@ -9,5 +9,5 @@
 // source have to figure out how to create revision.h just to get a build
 // going.  However, if it is not updated, it can be a version behind.
 
-#define GLSLANG_REVISION "24627"
-#define GLSLANG_DATE     "2013/12/30 13:40:03"
+#define GLSLANG_REVISION "24628"
+#define GLSLANG_DATE     "2013/12/30 13:44:49"

glslang/MachineIndependent/glslang.y

@@ -2276,16 +2276,25 @@ switch_statement_list
 
 case_label
     : CASE expression COLON {
+        $$ = 0;
         if (parseContext.switchLevel.size() == 0)
             parseContext.error($1.loc, "cannot appear outside switch statement", "case", "");
         else if (parseContext.switchLevel.back() != parseContext.controlFlowNestingLevel)
             parseContext.error($1.loc, "cannot be nested inside control flow", "case", "");
-        parseContext.constantValueCheck($2, "case");
-        parseContext.integerCheck($2, "case");
-        $$ = parseContext.intermediate.addBranch(EOpCase, $2, $1.loc);
+        else {
+            parseContext.constantValueCheck($2, "case");
+            parseContext.integerCheck($2, "case");
+            $$ = parseContext.intermediate.addBranch(EOpCase, $2, $1.loc);
+        }        
     }
     | DEFAULT COLON {
-        $$ = parseContext.intermediate.addBranch(EOpDefault, $1.loc);
+        $$ = 0;
+        if (parseContext.switchLevel.size() == 0)
+            parseContext.error($1.loc, "cannot appear outside switch statement", "default", "");
+        else if (parseContext.switchLevel.back() != parseContext.controlFlowNestingLevel)
+            parseContext.error($1.loc, "cannot be nested inside control flow", "default", "");
+        else
+            $$ = parseContext.intermediate.addBranch(EOpDefault, $1.loc);
     }
     ;