fixes bug when setting projection matrix

(cherry picked from commit e37d72369510e45a0895af88d47a7fdac93ceba9)

drivers/gles2/shaders/scene.glsl

@@ -424,9 +424,12 @@ void main() {
 
 #endif
 
+	mat4 local_projection_matrix = projection_matrix;
+
 	mat4 modelview = camera_inverse_matrix * world_matrix;
 	float roughness = 1.0;
 
+#define projection_matrix local_projection_matrix
 #define world_transform world_matrix
 
 	{

servers/visual/shader_types.cpp

@@ -76,7 +76,7 @@ ShaderTypes::ShaderTypes() {
 	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["CAMERA_MATRIX"] = constt(ShaderLanguage::TYPE_MAT4);
 	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["PROJECTION_MATRIX"] = ShaderLanguage::TYPE_MAT4;
 	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["MODELVIEW_MATRIX"] = ShaderLanguage::TYPE_MAT4;
-	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["INV_PROJECTION_MATRIX"] = ShaderLanguage::TYPE_MAT4;
+	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["INV_PROJECTION_MATRIX"] = constt(ShaderLanguage::TYPE_MAT4);
 	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["TIME"] = constt(ShaderLanguage::TYPE_FLOAT);
 	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["VIEWPORT_SIZE"] = constt(ShaderLanguage::TYPE_VEC2);
 	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["OUTPUT_IS_SRGB"] = constt(ShaderLanguage::TYPE_BOOL);