Destroy FBOs only on actual resize.

As a side effect, this means going to settings won't reset all FBOs
anymore.  The behavior can still be obtained by changing render resolution
or rendering mode.

This makes resizing the window faster on Windows, and resumes quicker from
pause.

GPU/GLES/FramebufferManagerGLES.cpp

@@ -1150,11 +1150,8 @@ void FramebufferManagerGLES::PackDepthbuffer(VirtualFramebuffer *vfb, int x, int
 void FramebufferManagerGLES::EndFrame() {
 	CHECK_GL_ERROR_IF_DEBUG();
 	if (resized_) {
-		// TODO: Only do this if the new size actually changed the renderwidth/height.
-		DestroyAllFBOs();
-
 		// Check if postprocessing shader is doing upscaling as it requires native resolution
-		const ShaderInfo *shaderInfo = 0;
+		const ShaderInfo *shaderInfo = nullptr;
 		if (g_Config.sPostShaderName != "Off") {
 			shaderInfo = GetPostShaderInfo(g_Config.sPostShaderName);
 		}
@@ -1183,7 +1180,9 @@ void FramebufferManagerGLES::EndFrame() {
 			PSP_CoreParameter().renderHeight = 272 * zoom;
 		}
 
-		UpdateSize();
+		if (UpdateSize() || g_Config.iRenderingMode == FB_NON_BUFFERED_MODE) {
+			DestroyAllFBOs();
+		}
 
 		resized_ = false;
 #ifdef _WIN32
@@ -1192,7 +1191,6 @@ void FramebufferManagerGLES::EndFrame() {
 			ShowScreenResolution();
 		}
 #endif
-		ClearBuffer();
 		DestroyDraw2DProgram();
 		SetLineWidth();
 	}