Fix issues from static analysis (#202)

* Casting a signed value which has type 'int' to a bigger unsigned integer type 'size_t' while initializing a variable
* Assignment of a signed value which has type 'int32_t' to a variable of a bigger integer type 'size_t'
* Uninitialized field

Signed-off-by: MuHong Byun <mh.byun@samsung.com>

Author: bwikbs

shell/platform/tizen/channels/text_input_channel.cc

@@ -267,8 +267,8 @@ void TextInputChannel::HandleMethodCall(
     if (composing_base_value == -1 && composing_extent_value == -1) {
       active_model_->EndComposing();
     } else {
-      size_t composing_start =
-          std::min(composing_base_value, composing_extent_value);
+      size_t composing_start = static_cast<size_t>(
+          std::min(composing_base_value, composing_extent_value));
       size_t cursor_offset = selection_base_value - composing_start;
 
       active_model_->SetComposingRange(

shell/platform/tizen/flutter_tizen_engine.cc

@@ -348,8 +348,8 @@ void FlutterTizenEngine::SendWindowMetrics(int32_t width,
                                            double pixel_ratio) {
   FlutterWindowMetricsEvent event = {};
   event.struct_size = sizeof(FlutterWindowMetricsEvent);
-  event.width = width;
-  event.height = height;
+  event.width = static_cast<size_t>(width);
+  event.height = static_cast<size_t>(height);
   if (pixel_ratio == 0.0) {
     // The scale factor is computed based on the display DPI and the current
     // profile. A fixed DPI value (72) is used on TVs. See:

shell/platform/tizen/public/flutter_platform_view.h

@@ -59,7 +59,8 @@ class PlatformView {
 class PlatformViewFactory {
  public:
   PlatformViewFactory(flutter::PluginRegistrar* registrar)
-      : registrar_(registrar),
+      : platform_window_(nullptr),
+        registrar_(registrar),
         codec_(flutter::StandardMessageCodec::GetInstance(nullptr)) {}
   virtual ~PlatformViewFactory() {}
   flutter::PluginRegistrar* GetPluginRegistrar() { return registrar_; }

shell/platform/tizen/tizen_input_method_context.cc

@@ -22,7 +22,6 @@ const char* GetEcoreImfContextAvailableId() {
 
 Ecore_IMF_Input_Panel_Layout TextInputTypeToEcoreIMFInputPanelLayout(
     const std::string& text_input_type) {
-  FT_ASSERT(panel_layout);
   if (text_input_type == "TextInputType.text" ||
       text_input_type == "TextInputType.multiline") {
     return ECORE_IMF_INPUT_PANEL_LAYOUT_NORMAL;