error code consistency for images (KhronosGroup#1459)

* error code consistency for images

* minor wording improvement

Author: bashbaug

api/opencl_platform_layer.asciidoc

@@ -367,7 +367,7 @@ errors footnote:[{fn-error-precedence}].
     ** if _platform_ is not a valid platform
   * {CL_INVALID_VALUE}
     ** if _param_name_ is not one of the supported values
-    ** if the size in bytes specified by _param_value_size_ is less than size of
+    ** if the size in bytes specified by _param_value_size_ is less than the size of
     the return type specified in the <<platform-queries-table, Platform
     Queries>> table and _param_value_ is not `NULL`
   * {CL_OUT_OF_HOST_MEMORY}
@@ -2274,7 +2274,7 @@ Otherwise, it returns one of the following errors:
     ** if _device_ is not a valid device
   * {CL_INVALID_VALUE}
     ** if _param_name_ is not one of the supported values
-    ** if the size in bytes specified by _param_value_size_ is less than size of
+    ** if the size in bytes specified by _param_value_size_ is less than the size of
     the return type specified in the <<device-queries-table, Device Queries>>
     table and _param_value_ is not `NULL`
   * {CL_OUT_OF_RESOURCES}
@@ -3776,7 +3776,7 @@ Otherwise, it returns one of the following errors:
     ** if _context_ is not a valid context
   * {CL_INVALID_VALUE}
     ** if _param_name_ is not one of the supported values
-    ** if the size in bytes specified by _param_value_size_ is less than size of
+    ** if the size in bytes specified by _param_value_size_ is less than the size of
     the return type specified in the <<context-info-table, Context Queries>>
     table and _param_value_ is not `NULL`
   * {CL_OUT_OF_RESOURCES}