libwebp: fix some int <-> size_t mix for buffer sizes

third_party/libwebp/webp/decode.h

 // Copyright 2010 Google Inc.
 //
 // This code is licensed under the same terms as WebM:
 //  Software License Agreement:  http://www.webmproject.org/license/software/
 //  Additional IP Rights Grant:  http://www.webmproject.org/license/additional/
 // -----------------------------------------------------------------------------
 //
 //  Main decoding functions for WEBP images.
 //
 // Author: Skal (pascal.massimino@gmail.com)
@@ skipping 104 matching lines @@
                MODE_RGB_565 = 6,
                // YUV modes must come after RGB ones.
                MODE_YUV = 7, MODE_YUVA = 8,  // yuv 4:2:0
                MODE_LAST = 9
              } WEBP_CSP_MODE;
 
 // Generic structure for describing the sample buffer.
 typedef struct {    // view as RGBA
   uint8_t* rgba;    // pointer to RGBA samples
   int stride;       // stride in bytes from one scanline to the next.
-  int size;         // total size of the *rgba buffer.
+  size_t size;      // total size of the *rgba buffer.
 } WebPRGBABuffer;
 
 typedef struct {              // view as YUVA
   uint8_t* y, *u, *v, *a;     // pointer to luma, chroma U/V, alpha samples
   int y_stride;               // luma stride
   int u_stride, v_stride;     // chroma strides
   int a_stride;               // alpha stride
-  int y_size;                 // luma plane size
-  int u_size, v_size;         // chroma planes size
-  int a_size;                 // alpha-plane size
+  size_t y_size;              // luma plane size
+  size_t u_size, v_size;      // chroma planes size
+  size_t a_size;              // alpha-plane size
 } WebPYUVABuffer;
 
 // Output buffer
 typedef struct {
   WEBP_CSP_MODE colorspace;  // Colorspace.
   int width, height;         // Dimensions.
   int is_external_memory;    // If true, 'internal_memory' pointer is not used.
   union {
     WebPRGBABuffer RGBA;
     WebPYUVABuffer YUVA;
@@ skipping 241 matching lines @@
 // 'config' into account. Return decoding status (VP8_STATUS_OK if decoding
 // was successful).
 WEBP_EXTERN(VP8StatusCode) WebPDecode(const uint8_t* data, uint32_t data_size,
                                       WebPDecoderConfig* const config);
 
 #if defined(__cplusplus) || defined(c_plusplus)
 }    // extern "C"
 #endif
 
 #endif  /* WEBP_WEBP_DECODE_H_ */