Fix uninitialized RGB in translating scanline

core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp

Index: core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp
diff --git a/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp b/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp
index 91a3725ad79cf0013f421ef83564b4fea1c3538f..5a5be647915798eea787052e939e41ff6ee1cb3f 100644
--- a/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp
+++ b/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp
@@ -992,7 +992,7 @@ void CPDF_DIBSource::TranslateScanline24bpp(FX_LPBYTE dest_scan, FX_LPCBYTE src_
     }
     CFX_FixedBufGrow<FX_FLOAT, 16> color_values1(m_nComponents);
     FX_FLOAT* color_values = color_values1;
-    FX_FLOAT R, G, B;
+    FX_FLOAT R = 0.0f, G = 0.0f, B = 0.0f;
     if (m_bpc == 8) {
         int src_byte_pos = 0;
         int dest_byte_pos = 0;