logic: Fixed relative paths not working Code::Blocks project files (issue #663)

* Index non-target files if no others available

testing/project_setup/cxx_cbp/checklist.txt

@@ -8,7 +8,7 @@
 * Click "Next"
 * Pick "Test.cbp" at "Code::Blocks Project"
 * Click "show source files" button
-* Validate "Source Files" list contains "src/main.cpp"
+* Validate "Source Files" list contains 2 files: "src/main.cpp", "src/test.cpp"
 * Click "OK"
 * Validate "Header Files & Directories to Index" contains "src" entry
 * Add "**/Foo.h" to "Excluded Files & Directories"
@@ -24,7 +24,7 @@
 * Click "Cancel"
 * Run "2_update.sh"
 * Press "Refresh" button
-* Validate "Files to clear" shows "3"
+* Validate "Files to clear" shows "4"
 * Validate "source files to index" shows "1"
 * Click "Start"
 * Validate Project indexed without error

testing/project_setup/cxx_cbp/data/Test.cbp

@@ -73,6 +73,10 @@
 		<Unit filename="<source_path>/main.cpp">
 			<Option target="Test"/>
 		</Unit>
+		<Unit filename="src/test.cpp">
+			<Option target="Test"/>
+		</Unit>
+		<Unit filename="src/no_target.cpp" />
 		<Unit filename="<source_path>/CMakeLists.txt">
 			<Option virtualFolder="CMake Files\"/>
 		</Unit>

testing/project_setup/cxx_cbp/data/src/no_target.cpp

@@ -0,0 +1,4 @@
+void no_target()
+{
+	int b = 7;
+}

testing/project_setup/cxx_cbp/data/src/test.cpp

@@ -0,0 +1,4 @@
+void test()
+{
+	int a = 42;
+}