Projucer: Avoid hitting some assertions in File::parseAbsolutePath() when searching for the DemoRunner on Windows

extras/Projucer/Source/Application/jucer_Application.cpp

@@ -733,11 +733,13 @@ static String getPlatformSpecificFileExtension()
 
 static File getPlatformSpecificProjectFolder()
 {
-    auto buildsFolder = getJUCEExamplesDirectoryPathFromGlobal().getChildFile ("DemoRunner").getChildFile ("Builds");
+    auto examplesDir = getJUCEExamplesDirectoryPathFromGlobal();
 
-    if (! buildsFolder.exists())
+    if (examplesDir == File())
         return {};
 
+    auto buildsFolder = examplesDir.getChildFile ("DemoRunner").getChildFile ("Builds");
+
    #if JUCE_MAC
     return buildsFolder.getChildFile ("MacOSX");
    #elif JUCE_WINDOWS
@@ -754,6 +756,9 @@ static File tryToFindDemoRunnerExecutableInBuilds()
 {
     auto projectFolder = getPlatformSpecificProjectFolder();
 
+    if (projectFolder == File())
+        return {};
+
    #if JUCE_MAC
     projectFolder = projectFolder.getChildFile ("build");
     auto demoRunnerExecutable = projectFolder.getChildFile ("Release").getChildFile ("DemoRunner.app");
@@ -822,12 +827,13 @@ File ProjucerApplication::tryToFindDemoRunnerExecutable()
     if (hasScannedForDemoRunnerExecutable)
         return lastDemoRunnerExectuableFile;
 
+    hasScannedForDemoRunnerExecutable = true;
+
     auto demoRunnerExecutable = tryToFindDemoRunnerExecutableInBuilds();
 
     if (demoRunnerExecutable == File())
         demoRunnerExecutable = tryToFindPrebuiltDemoRunnerExecutable();
 
-    hasScannedForDemoRunnerExecutable = true;
     lastDemoRunnerExectuableFile = demoRunnerExecutable;
 
     return demoRunnerExecutable;
@@ -840,8 +846,16 @@ File ProjucerApplication::tryToFindDemoRunnerProject()
     if (hasScannedForDemoRunnerProject)
         return lastDemoRunnerProjectFile;
 
+    hasScannedForDemoRunnerProject = true;
+
     auto projectFolder = getPlatformSpecificProjectFolder();
 
+    if (projectFolder == File())
+    {
+        lastDemoRunnerProjectFile = {};
+        return {};
+    }
+
    #if JUCE_MAC
     auto demoRunnerProjectFile = projectFolder.getChildFile ("DemoRunner.xcodeproj");
    #elif JUCE_WINDOWS
@@ -857,7 +871,6 @@ File ProjucerApplication::tryToFindDemoRunnerProject()
    #endif
         demoRunnerProjectFile = File();
 
-    hasScannedForDemoRunnerProject = true;
     lastDemoRunnerProjectFile = demoRunnerProjectFile;
 
     return demoRunnerProjectFile;